Absolutely first class write up.
Do you think the WALK kit has enhanced your diff any more, the poly bushes alone will give more control, but I'm interested to hear how the two compliment each other?
I did laugh with the string alignment job, I've seen something similar before and when it was stuck on a laser job at a later stage... it was bang on! You can't beat old school methods.
I have a firm belief (like you) thet you get what you pay for, sure VWR might charge £xx amount more, but they know what they're doing and you pay extra for the confidence. Some other tuners it just gets farmed out to the monkeys they have in the back on minimum wage and you just have to hope it was done right, a quick search on forums can provide plenty of examples of when they haven't.
In short, I love your car and I love your ethos to modding it. It sets a good example!