1. yes, Tos-1 was used in Chechnya. I cannot confirm which version was used, the TOS-1 or the TOS-1A. The launch boxes are different shapes for the variants. There are pictures of the rocket remains in Chechnya, but not of the launchers shooting, at least not that I have found.
2. SP Designs made 3 kits, based on the time of manufacture. The newest one, as on my
SAAMMODELS webpage is the newest and best cast. I have a older casting up on
eBay is a 2nd gen casting. They build up nice, but they might be a bit of work...not for a novice resin user anyhow. If you have built a resin conversion or 2, and know how to use super glue, fill seams, and such, it will be fine for you.