geco drive G540

so amazingly I just won a Geco G540 4-Axis Digital Step Drive on a facebook comp.


https://www.geckodrive.com/g540-4-ax...per-drive.html

Im hoping to start a new build soon, im yet to consult with the guy who did my electrics for my last build but the website says 3.5a per axis. I have no real idea if that's a lot or a little or if I should look at trying to upgrade if I can. or save it for another project. my plan is a 1220x660 work area built in steel 2.2kw spindle with csmio-m controller.