Tom in looking for info, I can see that these planes cant be bennetts. I havent found any of yours that use a piano hinge design. Any help with the pump would be appreciated.
I think ive figured it out, could this be one of your DAHPU's use on your hatch lifters?
Good to talk to you on the phone Dan!
As we discussed, those are Trimmaster Trim Tabs (they have been out of business for quite awhile).
The pump Bennett Dual Acting pump used for hatch lifters. It's a slightly older version of the one we make but should work for what you want to do.