I'm looking to buy some spare parts for the V93. I've been thinking of snagging one of the hk33 kits Apex is selling and just adding more of the common small parts, pins, springs, etc. and calling it good. However, do I NEED to go that route? Could I just buy some assorted small parts and hope to never need to replace a bolt head and/or carrier (because the prices of those two parts are downright frightening, which is why I'm seriously thinking of getting a kit just to use as spares)?