Spike thread length is not a problem. I can't remember what spike I used on my 5000's (replaced by 5200), but I think I used M6's.

To avoid costly mistakes I would borrow both a M6 and a M8 spike from a dealer to check which one fits.

Geir.

Geir

861v8, 504, 2*DSP8OOO.2, 4*DSP5200, F80, Barco CineVersum Blackwing two, DVDO VP50Pro, Sooloos Control-15 & Twinstore, Oppo-BDP103EU,
HD621, Dune HD Base 3.0, Apple TV, Mac Mini