Nub if you are talking boom block needle base? When you cut your rear tube in half to install it? Your sponsons are flapping in the wind like a kite...... rear boon tube very importtant to hold the sponsons when they are striking the water @ high rate of speed. (Front boom tube pratically does nothing) The rear tube sees all....... Torsional twist & high freq vibration. You had a 7 inch contact pad (boat to Tube) if you put rear boom block in Now you have less contact pad & a lot of FLEX........ maybe you can weld the tubes to the boom block needle control? :blink: :lol:
Better yet, get one of Brett's super strong boom tubes......
:lol:
Marty, there's only two of these "Boom valves" that Mr. Doane has manufactured. Nub has one of them. What Joe posted above is pure speculation and you fell for it. Check attached file. If you need these valves for twin , single hydro, mono, tunnel, etc. contact Rick Doane through this board. Mr. Doane will custom build to your need for any kind of needle out there (BVN, OS, CMB, and or Proto Doanes).