20mm rail

Looking for 20mm rail 2 off 800mm long with 4 carriages,

Looking for sr15mm rail 2 off 800mm long

Looking for 20mm rail 2 off 1000mm long with 4 carriages, or 2 off 25mm THK HR rails 1000mm long

might swap for two 25mm THK rails 792mm long with 4 HSR25CR carriages.

WHY

I have some Hiwin HGH15 rails - if I recall correctly I have four 760mm long rails and two longer rails (1100-1200mm I think, will have to check), plus at least 10 bearings to go with them. All new, genuine Hiwin bought a few years ago before they started turning up everywhere.

Is that one THK rail you have available to swap, or two? If it's two then I may be interested for my X3 mill conversion.

Two rails

Also have two THK ball screws, nuts have 6 tracks 28 OD with 30 dia thread on one end, complete with INA thrust bearings.

They are 5/8" dia x 0.2" pitch very close to 1605 would give ~400mm travel