This is the original throttle pos switch:
And the whole throttle housing:
I needed to convert it to potentiometer-style.
I've got one from a '98 BMW, but it (and every pot-style one) has a different mount/size.
I used a 4mm thick plastic plate to mount and some nuts to create spacing. Shaft is ~1cm longer for the switch type TPS than the potmeter style, and I didn't want to cut original parts.
This is the plastic part I made:
And the complete assembly:
Here you can see how did it others: