Get yourself a chain wear indicator, my X-Tools one cost less than a fiver from CRC. Does the job perfectly.
Back from my trip away now, I was riding two Intenses, a Tracer and an Uzzi in Keilder Forest...
The Tracer was a pretty XC setup, Fox 32s, skinny tyres and air shock. The Uzzi was set up with DHX 4, RS Totems and 2.4" Mountain Kings.
I started on the Tracer, as the trail starts uphill, it was pretty squirrelly because of the skinny tyres and the 32s where slightly over pressurised making the ride very jarry, not what I'm used to, even on my HT. It did feel light, and it was good at climbing, but I wasn't a fan of the over-all set up.
I did a few bits of down on the Tracer and it didn't inspire much confidence set up as it was, it really needed slackening on the front by a degree or so.
When we got to the top, I switched onto the Uzzi. I immediately felt like I was on a bike that could take me downhill faster. There was a little bit of climbing left, pretty steep stuff with rock slabs to get over. Because the Uzzi squatted more when standing, it helped when hopping up onto the slabs and the bigger tyres dug in more on the rain loosened stones. It was heavier climbing, and you could tell the difference between the two bikes but everything was still do-able, just slower. The front end gave me no problems, keeping my weight over the forks when necessary meant the bike handled well even in tight, slow turns.
Hitting the down hill, following Mike from the bike shop now on the Tracer, the Uzzi just flew. Jumps, drops, berms I was hitting everything faster and jumping higher than I ever had before, on a trail I don't know and on a bike I've never ridden before. I was keeping up with an ex-DH racer! That really says something to me: "Sort yourself out and get one of these". I had a huge grin on my face at the bottom, something that I know I wouldn't have on the Tracer. Not with a 32 on the front anyway.
My plan now is to try and get myself on a Tracer set up how I'd have it, 36 TALAS, coil rear, 2.3-2.4 tyres and see how I feel on that. I don't think the grin factor would match up to the Uzzi though, that thing just tears down anything.