Turbo Technics in Northampton will sell you a replacement CT20b for around

£600 on an exchange basis if yours is knackered.

Is your unit beyond repair? Turbo Technics will pick your unit up and do a free inspection

(well, plus carriage back).

I paid

£200 to refurbish the seals and bearing plus another

£90 for a new impeller wheel.

So, with delivery it was

£300 for a refurbished and tested unit

- half the price of a replacement one.

Turbo Technics can also go down the performance route

(ie steel bbs etc) if that's your bag.

HTH

Ian