I picked up the Rival-S at a gun show yesterday from a vendor which is a LGS. After reviewing the manual and the container contents I think I may have a few items that were missing from the container. Let me know if I'm wrong on any of these?

1) I have the adjustment tool which resembles a mini Canik, however in the manual it appears there may be a Torx bit intended to be inserted into the red receptacle of the tool. There were no bits included.

2) I have the magwell, however there is no screw to secure it to the frame as indicated in the instruction card.

3) I have the two (extra) backstraps in the container. I installed and compared all three, but I cannot tell any difference in size in terms of my hand fitting around the grip. Is it possible they're all the same size? Upon inspection, there does not seem to be any markings to distinguish them from one another (S/M/L for example)