Let's talk about new fangdangled formats for just about everything to do with today's modern MTB.

INTENSE HARD EDDIE 29ER FRAME
Frame material: Carbon Fibre.

Bottom bracket - Oversize hole 46mm diameter.
Had to buy a plastic push in thing so I can use my "old" fancy pants threaded bottom bracket.

Headset - Lower = drop in 1.5" internal bearing. Top =  drop in 1 1/8th" internal bearing.
Can't use Chris King "regular"1 1/8th headset.

Front Derailleur - most of today's derailleurs have all the guts hanging out the back - rubbing on the tire in this instance.
Fortunately with good stock to draw on I have a late model one that'll work.
The 1990 XT with steel cage lives in the parts box for another day.

Rear disc brake - runs underneath the downtube and along the underside of the chainstay.
Needed a new longer hose fitted.
$100 ouch. And I measured it wrong, so had to cut it once home and now requires re-bleeding.

Shifter cables - run internally, but unlike the 4 Kleins I have owned they do not come with pre lined inners.
Note to self: next time run the cables through the frame before excitedly installing new bottom bracket assembly and headset.
This will enable quick and easy installation of said cables instead of blindly wriggling them around in a post caffeine overloaded state.

I think that tomorrow I shall try just 2 coffees, they say one should cut back gently.

Other than that, looks nice.
Weighing in at 24.11 pounds - some 5.5 pounds lighter than the dual suspension Spider 29er.