I recently had a Skylon Swoop modified (skylon said they would sell me a new one of course) to fit in my garage.
I went to a local manufacturer and installer 5 min away from my house. Some may have heard of them, they are DBG CONCEPTS. The owner Gary is a great guy. Anyway their work is phenomenal! They manufacture and sell towers and also do you a custom tower if you need it. The towers are insane! The do stereos as well.
I am highly recommending them for your tower if you do not have one. They have like 5 or 6 boat dealers that they are installing for now here in town. They will travel as well. I think they did an install in Havasu a few weeks ago.
If your old comp boat or new I/O needs a tower and you are in socal or close to it, You need to get in touch with DBG Concepts. The work is some of the best of I have seen in a long time.
And I never advertise like this either. If someone truly deserves it like they do they should get the props. Because they deserve it at DBC Concepts. www.dbgconcepts.com
I think they're new tower is 2.5" and it is awesome!