I got a new Vortek kit in the mail tonight. Took about 15 minutes and it was installed.

The install was much easier. Based on comparing the 2 kits side by side. The Diana Model 48 T01 kit is different than the to5/t06. I was over on the Dianawerk collective forum and there is a definite difference in the length of the latch on the T01 verse the t05/t06 piston. As a result the T01 compresses the spring a bit more and this resulted in the binding and failure to cock with the t05/t06 unit was installed.

The recoil is not as harsh either as the original kit.

I did get a peak of 990 FPS with beeman crow magnums but velocities settled into about 970 after a couple shots. I expect this was due to some of the oil int he molly used on the piston seal dieseled slightly. Cpls are doing about 1050 FPS so I definitely need heavier pellets now.

Bruce