I fink everyones first few installs look like "a snakes wedding". Once u have confidence that yr installs do work ok then u suddenly get the urge to better them and thats when shorter wires and tidiness come in.
However, as mentioned b4....if it works its an ok install!
Do beware of emc trouble though with signal wires overlapping so much circuitry. I'm sure everyone remembers v5 problems with the m2 clock wire (wot a nitemare!!) No matter how short an how well bonded to groundplane I always ended up having to do a twisted pair.
Anyway, i waffel on. Well done seaney. U already above about 70% of installers by actually havin it work great after install.
Regards