Andy, I just got back on here, been up to the eyeballs with work and house alterations so apologies for the lateness in responding.
Don't risk your boat for the sake of a tenner, thats the price of a new set of (four) new seals.
If you need any seals or bits, give me a call :01493 754007
The boat's looking good mate, it makes a change from the basic yellow although it was really easy to see underwater.
Good luck with it, it's a very relaxing and enjoyable sub to operate.
Chris