Good work! Is that one of the harbor freight oring kits? Looks extensive.
Btw, I just finished putting an fcr on my 620adv, night and day difference. Highly recommended mod - should be at the top of your list. Seriously feels like a different bike. As for the money there are a few ways to do it on the cheap. I used a 39fcr off a 2008 Polaris outlaw 525s. It was a junkyard find but they can be found on eBay for under $100. I tapped it for a push cable, cleaned and jetted the carb and used the stock boots to mount it up. Total cost was $12 for jets/needle and $25 for cable. Had to modify the cables to fit my old school throttle housing, but yours should be plug and play!
Current Rides:1998 KTM 620 Adventure
Past Rides: 1994 KTM 400 EXC WP/D LC4 - Plated; 2001 BMW F650GS Thumper; 1970 CB175; 2003 KLR250