I should probably change my previous statement to:
Shane thinks it's an RB20
Donkey thinks it's an RB25
and Keegs thinks it's an RB24
Anyone for RB21, 22, 23, 27, 28, 29 ------
I won't know the displacement until I'm finished but I have a fair idea. It's going to be close to RB39
KTHNXBAI