Suggestions on closing a loop using gargraves and ross track

Try the Gargraves Fit-Up Blades.  These allow you to drop the Gargraves track in without picking up anything.

Very good!  Thank you!

Alternative is to file or clip the wings off the center of the track pins so that they’re just straight sided. Stuff the pins almost all the way in the last piece, leave it a little short. When you drop it in, grab the pins lightly with a pair of side cutting pliers and you should be able to slide them back. If the rail gap is too big and the train bangs over it, you can fill the height difference with solder.

You probably don't "need" the pins if you wire the solder the section to the adjoining ones and line everything up perfectly.

The Fit-Up blades do this without effort guys.

Thanks John and all!  I did use the fit up blades last night and had good luck with them.  I may be tempted to use them instead of pins as the wings on the pins make my track ends not meet.  Or as suggested I could file off the wings.  But this is a small irritation and may not be worth the effort.

Thanks again for all the great suggestions!

They're made for the very scenario you posted, the last piece of track you want to drop in without ripping anything up.