OK- Hakan, you have us very interested again! What is the secret for angles between your spin pole supports and the bows?
I saw that the Marstrom A-cat of Bret Moss has quite long carbon fiber supports for his spin pole. I made the supports for my A-cat spinpole from my wife's aluminum ski poles, so they may seem too short: My fiberglass pole bends alarmingly but nothing has broken- yet!