Anyone ever shortened a boom?

I have an HPL 220 Race boom, which is a great boom (220-250). It has a Maui Sails head and is in good nick.

But now my largest sail is 9.6m with a boom length of 230.

My other boom is 160-220, which gets pretty flexy on my 8.6m (boom 217) which is a bit too small for the big boom.

I was thinking of taking 20cm off making it 200-230 for 7.5m - 9.6m. Or 10cm for 210-240 for 8.6-9.6.

Is this a stoopid idea? Anyone tried it?

Not stoopid. Smart people pay me smart money to do just that.

I've seen your workbench - I'm sure you can manage it!

I would only shorten the book by 10cm.
Main reason is that it will remain a bit stiffer for the larger sail due to the arm and end piece overlapping.
The other point is that te boom might be too wide at the front to be usable for the 7,8 because the shape of the book will remain.
I did the same in the past and also added some information in the Starboard forum, maybe you see if you can find it.
~Shinobi

I too would like to take a few cm off my NP race boom,
I guess I need these; does anyone know where they may be available in Australia?

http://www.24-7boardsports.com/neil-pryde-trim-lock-double-for-race-boom/

thanks, how do you remove them?

whitelionwindsurfing.blogspot.com/2010/04/diy-booms-shortening-x9-boom.html

www.peterman.dk/windsurf-NP-X9-boom-shortening-1000.htm

They are a couple links I researched on the topic.
Cheers
Marty