Has anyone removed the cover from the bottom of a Legacy base? I could use a photo of how the U terminal 'bolt' assembly attaches to the circuit board. I mistakenly removed the U terminal 'bolt' by unscrewing it from the base, to find out the nuts and washers inside all fall loose. Now I can not figure out the sequence of the nuts and washers to put it back together.
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I hope this helps.
Yikes! The bigger the blob the better the job method of soldering?
That is one pretty ugly soldering job, I'll never make apologies for any of my work! 
Employee. Soldering iron is broke sir. Boss. Here use this Propane Torch I was using to solder that 3" water pipe. 
Employee. Soldering iron is broke sir. Boss. Here use this Propane Torch I was using to solder that 3" water pipe.
Actually it probably went more like this:
烙铁是打破爵士
这里使用这个丙烷火炬我使用到焊料3“水管。
Cut her some slack, shes only 14
I'll make it a point never to open up the Legacy base, I can see that I'd be appalled at what I'd find! 
I hope this helps.
Thank you. I'm not sure of the sequence of parts based on the photo. It looks like the 2 nuts, then flat washer, then lock washer, then possibly a round plastic cylinder (not visible in the photo). Or perhaps the plastic cylinder is from another location within the base.
Not sure where the soldered connector fits in that sequence. It's a very strange design. Depending on the final sequence, that giant solder blob may be necessary. Best I can tell is the bolt threads tighten using the metal connector as the 'nut.', and nothing else holds the bolt into the base except for that soldered connector. If that's correct, it would appear that if the bolt is ever overtightened it'll pull the connector right off the board.
I hope this helps.
Thank you. I'm not sure of the sequence of parts based on the photo. It looks like the 2 nuts, then flat washer, then lock washer, then possibly a round plastic cylinder (not visible in the photo). Or perhaps the plastic cylinder is from another location within the base.
Not sure where the soldered connector fits in that sequence. It's a very strange design. Depending on the final sequence, that giant solder blob may be necessary. Best I can tell is the bolt threads tighten using the metal connector as the 'nut.', and nothing else holds the bolt into the base except for that soldered connector. If that's correct, it would appear that if the bolt is ever overtightened it'll pull the connector right off the board.
The banana jack binding post mounts with a plastic ring, lock washer and a nut. Tight. Then the solder terminal is installed and the second nut tightened to keep that solid. Then the solder blob is made. It is not uncommon for the banana jack binding post to get loose and the best way to tighten it is to start over again with the post, plastic ring (spacer), lock washer, nut, solder terminal, and nut. Then solder. Hold the first nut with a small wrench when tightening the second nut.
It is probably best to use a banana plug for the U connection. That way you are not torqueing on the banana post when tightening against a U connection spade connector all the time.
It's dumb, but then the electronics industry does exactly this same install and they can get loose.
BTW, when you take the base apart, put a small square of black tape over the channel button first. Then it won't fall into the guts when you take the bottom off. It's small and can be hard to find. And don't turn over the base to shake it out because the plastic retainers that hold the vent screens in will fall out. Just work with the base upside down...there's no reason to turn it upright anyway unless you want extra work.
Not that I have any personal experience...
BTW, when you take the base apart, put a small square of black tape over the channel button first. Then it won't fall into the guts when you take the bottom off. It's small and can be hard to find. And don't turn over the base to shake it out because the plastic retainers that hold the vent screens in will fall out. Just work with the base upside down...there's no reason to turn it upright anyway unless you want extra work.
Not that I have any personal experience...
This is all great information. Thank you. Generally I'm good with sort of puzzle, but this time the base won.
With this design I agree a banana plug is a wise choice.
And yes, mystery parts formed such as the screen holders. I can add to this (unfortunately with a separate experience) that putting the remote back together is even more interesting. OMG there's a lot loose parts with that operation.
What does a Legacy Base sell for ?
You can't buy the base alone, the #990 set is going for $299 street price right now.
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