This is not new information by any means! Modifications have been done to these units for various reasons. I chose to wall mount my pump, install 90degree fittings at the column bases, and lengthen one hose. Of course now my pump is not going anywhere, but sure gets it out of my way, and I placed my pump so it's easily accessed at a comfortable height. As for lengthening a hose, at least in my case, made no difference in how the lift works, the carriages went up at the same pace, however, now and then, a car may go up a little off kilter, ( i think sometimes a tad of air gets inline possibly) i bought hose and a union(spice)from Northren Tools. The 90 degree ends I feel should come with the units: gives just a tad more length and allows the hoses lay flatter on the floor, less likely to trip over the hoses. The 90's I bought from a local hydraulic shop.
So that's my tips for the day
Chetter, those stands are great, but a little fisty to assemble, can't beat the price on em, that's for sure! I'll be anxious to see your floor when it's done