Hi Baz,
Yeh its not impossible just a lot of faff and extra expence which could be avoided. There's enough to deal with getting the car through the IVA without the added complication of the cat and engine management.
It also helps to have some understanding of what is needed when 'tuning' the engine management as there have been a number of posts on LCB over the last year where people have blown their engines up
A little knowledge being dangerous and all that...
BV
