Quote Originally Posted by T 20 View Post
Hi Steve

The b2 piston seems to work well enough and your Vortek adaptor and seal should fit if it has a 5mm retaining bolt.

The b2 piston could be spun by the latchrod in an electric drill to linish the bearing surfaces down to fit the 25mm Weihrauch tube.

I increased the depth of the cutout in the latchrod using a 4" angle grinder with a very small cutting disc in it, sounds bad but I use angle grinders on a daily basis so I didn't even worry about it --- a Dremel should do the same job, but slower.

The HW50 I've used as a guinea pig is running at 8ftlbs in .22" and has a really nice firing cycle, in fact it's that nice I may just keep it at 8ftlbs as a close range ratting gun.
Hi Mick
Once again.....many thanks.
I shot the 55 at the range last Sunday and it had a lovely shot cycle, however it has a bit of a buzz from the spring. I'll be trying a new spring guide shortly as soon as I get my Myford back up and running.
I will however follow your example and build a replacement piston.
Once again....many thanks.
Steve