these investarms kits practically build themselves. the only real work is final shaping of the stock, should you even wish to do so. leave all the furniture on and rasp the proud wood to meet the metal, apply a stain and rub in some oil or polyu, done. it's fine if you wish not to work the wood, but you will need to take down the lock mortise outside wood in order to get the cock to function smoothly ... just a block of wood and some 80 or 100 grit. these will be the 7th and 8th kits i've done, 5 have been italian investarms (the best of all offshore kits), and three spanish (a cva and 2 traditions). parts to these kits fit surprisingly well ... here's the gpr lock and touch hole dry fit fit (the breech tang isn't home yet and protrudes up) ...
... notice the proofing gunk in the touch hole liner screw hole. it can easily be cleaned out without removing the breech plug, but i'll remove the breech plug anyway, clean and put back with anti-seize lube to make for easy future removal by mitigating the migration of bp residue into the threads, which as we all know will happen sooner than later!