I used concreate test cors. They wer free from the test center.

Mike
***********

Hello Group,

has anyone out there converted an old lifeboat into something like a
'Canal Boat'? I am working with a 26 foot aluminium hull. Presently
building a cabin to make it so i can spend some time on the boat, with
berths and cooking facilities etc. I have an older 18 horse Yanmar
diesel to install. I understand that I will need some ballast to keep
the boat from bobbing like a cork. Question: what kind of ballast?
Cement? and how much? Thanks in advance! Ingmar