Does anyone know of any cylinders that could be used to convert the NJCB Z-1a with slide valves to a Z-1b with piston valves? Thanks,Roger Huber -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://pairlist6.pair.net/pipermail/nw-modeling-list/attachments/20160703/a074e250/attachment.html>