Does anyone make a Angleset for 1&1/8s head tubes?
Yep, Works Components has just started producing them in the UK, slackens the head angle by 1˚
http://www.workscomponents.co.uk/index.asp
Or if you want more slackness, may be possible using this guy, Saar, who posts on mtbr and does it as a sideline. Really helpful, great customer service:
http://www.ofanaim.net/has.html
I'm about to slacken my Pace RC405 by 2˚ - headset's in the post right now. Slackening your steering isn't going to massively change the forces going through your headtube, but the way I read it, at the same time as slackening the head angle, you'll also drop the bottom bracket slightly and steepen the seat angle by the same number of degrees which will move your weight further forward on the bike and stop it turning into a wandery nightmare on climbs, which tends to be what happens if you just stick longer forks on and tip everything back.
If you thihnk it through, lifting the front of the bike tips the seat angle back, moves your weight over the rear wheel and changes the balance of the bike - less weight on the front, wandery on climbs, lifts front wheel more easily etc.
The Pace is designed around a 130mm fork, works okay with a 140mm Pike, but sticking a 150mm Revelation on it really screwed up its ability to climb, thinking is that slackening it off - while using a shorter, 50mm or 60mm stem to keep the steering sharp - should drop the front enough to make a 150mm fork feasible or be lower with a 140mm, plus the steeper seat angle - you can adjust a bit with saddle position - should move rider weight forward, weight the front wheel and keep the front down on steep ups.
Which is why an angleset or similar makes a lot more sense than simply throwing a set of long forks in there. Of course you might end up with more pedal strikes thanks to the lower BB, but the lower c of g should also help with cornering and the slacker front end, ought to be more stable at speed and on the steeps.