Bayblaster said... What's wrong with your current Hydro 170?
It should adjust out to 220 & being 32mm would be stronger than most new booms.
At your weight I would not go with any reduced diameter alloy boom, carbon only

By the way it is at least 10 years old going by that description

The boom was good, never broke or bent on me.
Dont know how old it is for sure but if it's that old then it must have been sitting out the back of the shop awhile. Actually havent windsurfed in ages so who knows?Theres some corrosion on the tailpiece and the V Cleat in the clamp has corroded so wont grip the rope. I will hose down my next boom.
It was hard to get a real stiff lock/connection to the mast at the clamp though, seemed to be abit of movement (twist?) when using it.
What diamater alloy should I be looking for if not reduced?
I am not 100% sure which model you have, we had a lot of models back then.
It may be an Enduro which could explain some movement at the mast connection but would also mean that the clew cleat can be changed out for a few dollars.
You could also replace the front fitting with a better one also, stiffer material.
It might also be as simple as an adjustment problem.
Send me some photos & I may be able to save you some money.
This is the benefit of buying Australian made, spare parts & service

At 95kg I would not be buying any brand of reduced diameter alloy boom regardless of how
good well they are marketed