Hi Kieran.
Thanks for suggestions. I have considered same, but I've decided to walk before I run on the first loco project. I have the SSM detailing kit, but the grills don't match for C class (i.e. the SF body grill seems incorrectly much wider), I've already filed off the headlamp as the loco will be pre-rebuilt era, and I quite like the existing resin grill on top, which leaves brass for just the front window surrounds, wipers, etc. I will save the SSM detail kit for an A class project where I can use all of the brass. For this C class I have a modified centre drive chassis which fills the internal space, so little point having a see through grill (i.e. on the prototype you could see right through the loco from one side to the other).
The three areas I wan't to concentrate on for this first loco 'training exercise', is the quality and precision of the paint job, chassis running performance as per the prototype (i.e. due weight, all wheel drive and all wheel pickup), and DCC sound.
Noel