Mark Rehorst's Tech Topics

My technical projects that include topics such as 3D printing and printer design, photography, optics, electronics, etc.

Tuesday, April 14, 2026

Update on Arrakis 3.1- a New Mode of Operation?

Arrakis 3.1 has been working well after I sorted out some issues with the mechanism and the electronics. It is fast and quiet and not too u...

Friday, February 27, 2026

Wiim Amp Ultra for the Quads

A while back I bought a Wiim Amp Pro (WAP) to replace the electronics in my bedroom stereo system. After I realized the bass management can...

Thursday, February 26, 2026

Arrakis 3.0 Updates- Now It's Arrakis 3.1

Update 3/31/26 The mechanism started making noise again, so I opened the table up and found that the belt was climbing on the corner pulleys...

Monday, February 9, 2026

3D Printed Knobs For My LG Stove

I've had a wonderful LG stove with induction cooktop and convection oven for a couple years. Everything about it is great, except the c...

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