Aluminium Profile Type Router - Initial questions

[JAZZCNC]

I did run it slow and seemed ok but worried it would wear the ballnut fast .
Nope that ballscrew was the only one not from Fred , I ordered it in the EU to save time but wishing I hadn't now!
The seller is saying "For a ballscrew the external outer diameter is a totally unimportant dimension, because it connects to the ballnut with balls" which kind of makes sense but why call it a 16mm screw then. And Fred's are 16mm within 0.01mm ...

Yes didn't think it would have been as Fred's screws are also ways within 0.01 of specified like they should be. Send it back would be my suggestion and fit the old one if it's only slightly bent. Then buy a new one from Fred if it gives you any grief.

[CNCRY]

Will post some progress photos soon, but have now pretty much completed the wiring and physical build.
Cable chain finally arrived from China so the (crazy) amount of wiring is now running back into the control box and 4 separate limits wired in.
I setup the limit and tested jogging into them and all good there. Machine is running at 4m/min currently as Jazz suggested, until I tune it further.
I ended up straightening the ballscrew mostly, using the advanced method of compressing between some hardwood and rotating it. But now it's back in the mount it seems to be running pretty well at 100% jog speed. I think my drill test made it seem a lot worse plus there was some slight misalignment of the motor coupler. I do notice the X axis is very smooth even compared to the dual Y.
My next test after jogging was homing.

So X and Z - moved along, hit the limit stopped and backed off - great.
Dual Y - both axis moved towards limit, one side hit limit switch fractionally before the other, then the one which hit the limit seems to keep going and the other side never hits the limit, so the gantry starts to go off square and hit the ESTOP before it breaks the gantry!

I have both axis set to have homing to the negative limit and 2 separate limit pins set so not sure what is going on here.
When I jog the axis slowly into limit it hit both pins and stopped, both flag up in UCCNC as hit.

Before I post on UCCNC forum am I missing something obvious here in the homing sequence for dual axis?

[CNCRY]

Sorted - the limit switches for each side of the Y axis did not match the drivers, so when one switch triggered it stopped the opposing side motor. Fine while I was testing limits, not so much for homing operations!
Homing all working now. Just waiting on some ER20 collets now and hoping to make first cuts very soon.
So far I just have a ply bed as I figure I'll probably have a few accidents, then thinking to use an MDF bed with threaded inserts fitted from underneath every X cm to allow fixing from above without using screws.
Need some practice before going for a more expensive material for the bed!
Still overwhelmed by the amount of settings in CAM around ramp speeds, lead in speed, plunge speeds, feed's etc and how much is OK to leave at default and how much to change.