Hi does anyone know the tech spec on the old Blur Classic? I’m wondering about the head angle and the seat angle specifically. Thanks.

71 deg on a large with a 100mm fork, seat 72 IIRC. Any fork longer than 100 will make it a bit wandery on climbs, but I run a 110-140 and it’s great descending set at 140. A less drastic way to slacken it is to run 33% sag in the shock; makes the bike descend really well and doesn’t affect the ride otherwise at all.
A great bike I think as it’s way lighter than a Nickel but still strongly built.