congrats on your 909, who's list you waiting on for the tune? i got my fully tuned 909 single tube and my shin-sung 201 fire 9mm back from Leroy at B.G.M.F took about a month for both to be done, the 9 mm 201 fire is at 200 fpe now with what i have tested it with,and the 909 is at 360 fpe + , i get 3 really powerful shots out of the 909,but for the single tube that's fine for the power it has,did you get the 500cc twin tube or the single tube 909 ?mine loves 228 gr 456 lee molded round nose bootlit,s and the 255 gr 454 flat lee mold, hope you got 4500psi tank,and not pumping,enjoy your new 909 there a lot of fun to shoot.
After watching a couple videos of the SamYangs, I just really don't like the sliding loading port single shot setup, and would much prefer a repeater/side lever like the two aforementioned guns.