Hi. I have been trying various extension cables with my pimax and have found three low cost cables that are compatible. I felt an extension cable was required to prevent any damage to my computers ports and act as a breakout box. They are from Amazon and eBay U.K. Links below.
Thank you.
Wayne
USB 3 £6.59
Power extension £5.99
Display port 1.2A £8.71
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F352288294123