Have not owned or shot a Glock for 20 years. Then last week a friend gave me a new ZEV G35 slide. So spent some time trying to figure out a way to put this together as a inexpensive shooter. Bought a new complete Gen3 model 17 lower, NIB & some mags off GunBroker, ordered a 9mm conversion barrel from KKM, a OEM slide parts kit from Midway and some factory sights off Ebay. I figure with the free slide and 5 mags I will have $430 in this project which hopefully is not grossly more than I should. I guess I should have registered here and asked before I bought all the parts but I have wasted more money in the past without having anything to show for it but a headache the next morning. I was told the slide parts are pretty much plug & play. Everything should be here except the barrel next week. Is there anything I need to be careful about or I have forgotten?