The spring kit installation isn't too complicated either. The process [with the mill disassembled] took less than 30 minutes. The steps included:
- Drilling a 10mm hole in the back of the column
- Drilling and taping two M6x1 screw holes
- Bolting a [provided] braket and post to the head
- Bolting the air spring to the column
- Bolting the two together
|Top End of the Travel|
The table [at least my specimen] had much better finish that then stock HF table, and appears to be much more accurate. My original table had horrible binding problems especially on the cross travel, and the table had close to .007" of runout over the the 9" of travel. The new table appears to have about .001"-.002" over 12", and not binding I can detect. The increased travel is very noticeable, but I imagine I'll have to modify the head to bring it forward at least an inch.
|Table Moved to the Front||Table Moved to the Back|
Overall, I'm very happy with the purchase. The whole thing, including shipping, set me back a bit over $400. In addition to the 30% travel increase on all three axes, the air spring and the new table have significantly improved the feel of the machine.