Collimation thumb screws

[Jimmy Rocket]

Hi all came across these on eBay today, thumb screws to replace the Allen grub screws on the secondary mirror on dobs/parabolic scopes. What's your thoughts?

https://www.ebay.co.uk/itm/265381843488?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=AoBSuMVjTx2&sssrc=2349624&ssuid=fhAI2B4RQ72&var=565215970627&widget_ver=artemis&media=COPY

Edited November 16, 2022 by Jimmy Rocket
Link added

[Ratlet]

I picked up a set of the 30mm m4 in black for my 130pds.  Works a treat.  Just change them out one at a time.

Edited November 16, 2022 by Ratlet
mm not m

[Spile]

Yes no reason not to change them as long as you get the right thread and length. For my Skywatcher I used 30mm M4