I use a HOLUX GPS Sport 245 and find it brilliant. No wires or transducers as its GPS and very accurate. A bit difficult to find in the UK now but the are available from overseas.
A pair of S3 Rear Wings complete with Stainless Stone guards. Off a 1999 Supersport and painted Citroen Poseidon Blue. Normal gravel rash on the leading edges. Located in Woking £50.00
5 Uniroyal Rainexpert tyres 185/70 x 13 as new having done less than 500 miles £150.00 (I somehow managed to buy the wrong profile!) Collection only from Woking area