Eric,
My X2 clone is just that...Although it came from Chester Tools here in the UK it is different to the general mill.
Mine has a larger 550 watt motor and a larger table with feed handles at each end of the X axis.
The belt drive write up by Jerry Rollet didnt fit exactly, there were dimensional differences between the mill he designed the conversion for and mine. Nothing that couldnt be resolved..

But just shows that not all mini mills are the same

I'm not sure if the extended rack would help as I can lower the head on mine such that the spindle will meet the table...
If you are considering selling on the kit let me know especially if the postal costs are favourable

( not sure how we would organise payment? )
cheers
John