Easy boys, each to there own! I've done all above conversions, crystal with 55/60, 60/90, 60/100, hid bla bla, with the 55/60 they are not to bad you 'CAN' plug and play but... With any upgrade I recommend using relays as you get much better out come, and lessen the risk of melting looms!

In my past I have melted looms by doing this upgrade cos I never fitted relays but it also comes down to how long they are on for, how often, and the connections at each end, if corroded then it will make things alot worse!

I can try and find pics I have around of what happens ect if needed and can draw a simple drawing of wiring if needed