It is hard for me to see how much "arch" there is under your lathe, but one handy trick I learned is to put a shelf between the lathe and the stand. I bought my lathe used, and the seller included the shelf. Another trick I learned is to put an on/off switch in a convenient place.
Photo: Lathe with shelf and on/off switch. The photo is somewhat misleading. The shelf does not protrude much, and it does not interfere with woodturning in any way.