That mod looks good to me - can you do some minor stuff like deans conversion, spring/gear swaps, aoe correction/shim/lube and such as well? My guns are overdue for a tune-up. Also what sort of turnaround time? The total body of work I'm looking at is as follows:
1. VFC M4 (very old): hop patch mod, new spring and gears, convert to deans, shim/lube/aoe
2. Echo 1 AKS-74u: spring swap, convert to deans, shim/lube/aoe
3. LCT AK74m: hop patch mod, spring swap, shim/lube/aoe
4. A&K M60E4: outer barrel fitment issues, hop patch mod, convert to deans, shim/lube/aoe
I also have a G&P M4 on order that will need the hop patch mod and re-wiring to the rear.