Hi Chazz,
Thanx for the info.
My supplier- Ruddogshop- of X6sq parts promissed me the 5660 is OK- "this one we use ", so I took it.

Later I saw that there is a new 5661.....
Because I have milling machine and turnlathe, spacers or other stuff isnt problem for me.
Anyway, service and support X Factory.............. NR.1!!!!!!!!!
XF rules!!!!!