These guides, tools and adhesive kit made this a pleasurable screen replacement. Many thanks to all involved in making this a better alternative to using a phone shop.
Took me 3 heat cycles with the iOpener. Basically I did 30 seconds in 1000W microwave and left to heat adhesive for 5 mins, then after stuggling to get the pick in for a few minutes, I did 10 seconds microwave then a couple of mins warming adhesive and a couple of mins failing to get the pick in. Then on 3rd attempt after anothe 10mseconds in the microwave, i got in easily. Seems like the adhesive really takes a while to melt. I also improved my technique with the suction cup which seemed to help lift the screen. Once you are in it is easy to release the remaining clips.