Are needle positioners for brushless servo motor drives all the same

[beefy]

I've bought a couple of these cheapy Chinese brushless servo drives for my industrial machines.

https://www.ebay.com.au/itm/145766877894

They both work (at least for now LOL) and coupled with the 4 pulley reduction systems I've fitted, make life absolute heaven.

However, the instructions are the typical useless "Chinglish" where you have to attempt to work out what you are being told.

Nothing happens when I attempt to check the needle positioner setting, so my questions are:

1). Is it typical that without a needle positioner connected, you cannot enter the setting for needle positioning.

2). I cannot find a needle positioner in the seller Ebay store, so will any needle positioner that's meant for a brushless servo drive work.