i have an avon searider 4m, i want to replace the valves and have been told that its a bit fiddly but the rubber will stretch and the valve will pop out and a new one can be squeezed in! is this true? or do i have to use a hairdryer and soften the glue and remove the patch that the valve is in? does avon itself offer a retubeing service or is it a seperate service provided by third parties? any ideas on prices of replacing tubes on a 4 m would be very helpfull.
thank you for all your help