Hi
I have replaced the for seals on a few bikes and completely stripped down Fireblades forks and re built them. It really is not that hard if you take your time. I even used to use the plastic pipe mod to fit the seals before I bought a tool for the job and it works well. ( the mod is on Del Boys garage on you tube) Go on YouTube and look up bel boys garage fork seal change that should help you a lot. Ps I have never needed a tool to release the spring on the bikes I have done.
+1 I used Del Boy's technique on my roadie and it worked just fine. That was about 9000 miles ago so I feel good about it.