Sent my .25 Sumatra carbine off for a tune & .22 Rainstorm-I for some work. The difference with my Sumatra is like day & night. Shot string consistency & trigger is much better now. With the Rainstorm, I had a seal replaced & had Will install an adjustable transfer port. Sumatra is shooting right at 69fpe & the Rainstorm is getting 50fpe with Eun Jin 28g's. I wanted both rifles set up for hunting. Will Piatt is a top notch tuner.