Well I have been slowly tweaking parts on my Python, Stheno, with the Engineers, and this is how she currently sits:
http://coriolis.edcd.io/outfit/pyth...wJJiTogIXga5L25ICkQ8f8-AGiDeKf2AAAA?bn=Stheno
No major upgrades on the whole, other than the FSD and Drives which are level 4 for the FSD, and level 3 dirty drives.
One of the pulse has the scramble spectrun secondary effects, and the Burst (in the prow) has the inertial impact secondary effect.
Next up is a tweak to the medium multicannons, although I do have a couple of lightweights I may mount for now stored away.
I run mostly missions, with the odd passenger delivery or some pure trade. Just a nice ship to pilot for some enjoyable time in game.
Edit IN: Having finally entered this all on coriollis I can see it would actually be worth upgrading my power plant a little for some more power (and with an eye on a lower mass

), to allow the equipment to sit nicer in the power bands. looks like I know what I am up to next....