Brian,
I am in the proccess of "designing" and attaching an o/b bracket to the starboard pushpit for my Honda 2hp. Most "commercial" brackets seem to attach to a single vertical tube and sometimes a horizontal one as well. The 235 pushpit is rather basic and appears not very suitable for brackets such as these (as you have no doubt found)especially as it also has to accommodate an inflatable lifebuoy. I plan to attach a suitable wooden block to the aft vertical and the horizontal tubes by use of s/s saddle fittings. Hopefully, this will hold the bracket firmly (the 2 fittings preventing movement both vertically snd horizontally). If the scheme is successful I will post some pics (providing I find how to do this?!).
Regards
Chris Cobb
235/48 "Tarakihi"