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Old 02-24-2015   #11
Salt Lake City, Utah
Paddling Since: 1987
Join Date: Sep 2012
Posts: 52
Caverdan has it right. It adds an additional gliding surface to keep the plunger centered and it also provides additional support for the straps.

Best of luck. I'm interested to hear how hard these are for others to build. Remember the tolerances do not have to be too tight.

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Old 06-28-2015   #12
MT4Runner's Avatar
Kalispell, Montana
Paddling Since: 1997
Join Date: Apr 2012
Posts: 1,436
I've finally started mine.

I built the plunger and barrel. I put it on the bottom cap and I couldn't push it down due to air pressure. Very impressive.

I still need to build the hose assembly.

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