CDTi Remap questions...

[LowFlyingBus]

Hi all!

I'm starting this thread as after a fair bit of searching I still have a few questions. Shove me in the right direction if I'm asking what's already out there...

I've now owned the Low Flying Bus (2004 CDTi Connoisseur Tourer in Firefrost) about a month and she's going great. I've ticked off most of the more important maintenance items, the last being flushing the autobox fluid as per a guide I found on here which went well and did slightly 'sweeten' the shifts, not there was any real issue before. She's only just approaching 100k miles.

The interior still needs a bit of work (headlining and door trim) but it's not a priority at present.

I've just ordered a TOAF compatible cable, so I can do any diagnostics needed. I already had (from previous car) a elm327 bluetooth adaptor and generic phone app which can't seem to read Rover codes but was able to clear a self-induced check engine light (I forgot to plug a sensor back in!)

Budget allowing, I'm starting to wonder about a remap...
Is it possible to do a DIY remap via TOAF? I've seen a couple or vague references, but no hard info.

I have zero tuning skills, but know enough not to dabble at random... so I suppose I'm asking if there is such a thing as a 'readymade' remap available from anyone, or if this is completely missing the point, or just not possible.

If the answer is no, any suggestions on a good remapper within reach of Somerset?

Next question I'm almost embarrassed to ask - anyone running an 'interesting' exhaust on a CDTi? I feel like a gruff 'Landy' diesel exhaust note probably doesn't suit a 75's style... but would it help performance? Anything I do has got to be reversible as I feel like 75's are getting slightly collectable and I do not want to ruin its value in any way. Also, any thoughts on a remap in this regard too? It's not as if the car is mint, just a tidy example so a remap probably isn't a bad thing...

Thanks in advance for any input!

Cheers Steve