[Closed] Training tips for first race (IOM end2end)

I've signed up for the Isle of Man end2end race in September, it's going to to be my first such event.

I'd class my fitness as average, I go to a trail centre about once a month, local trails weekly and have a 10 mile round trip commute 5 times a week. I'm never riding for more than 3 or so hours though, so I think the end2end is going to be a big step up.

If anyone has any tips or advice on how to build up for the event, I'd greatly appreciate it. I'm thinking of doing a 50 miler per month and some swimming/gym/running.

Also, I'm wondering what setup to use. I have a Swift which is currently SS (32-18) and rigid. In peoples experience would some bouncy forks be an advantage?

Cheers very much.