ACO light shadow elevations - Which screws are used for mounting?

Hello everyone,

a quick question that sounds very simple but I can't find anything about it on the ACO pages. It's about the height-adjustable light shaft extensions (3-30cm) that are slipped over the standard light shaft and then screwed in. Which screws did you use there?

Have a nice weekend

Completely normal Spax, so far it holds.

Totally ordinary Spax, it’s holding so far.

Good to know! Pre-drill with a small drill bit? What size did you use? 6mm screws? Thanks for the info!

I took the first ones I could get my hands on. Without pre-drilling. The shaft is then stabilized by the soil, so I didn't think much about it.