I'm looking to upgrade my 1942 IR Turbo Blower that currently has a 1960's Hagan 5 X 10 positioner. It's presently pneudraulic system with a 4-20ma control system. The machine in question is being overhauled presently and I would prefer to be ahead of the rebuild with a new positioner. I have a ValTek Rep coming this week but need more choices as this is a gov'mt job. Any help would be appreciated.