Hi guys ! Thanks for all the inputs.
I cant get a LapBoy, no more avaible.
I really like the idea of the Orion device, but it's out of my budget - unless I can find a used one in my area.
The idea with the video camera suits me nice, since I already got the video and a tripod. I'll miss the 10' and 100' of seconds pr. lap, but if I practise for 5 minutes, I'll get the picture at an average level by dividing the total time with the laps. It's not the easiest way, but it can be done and it's cheap and accurate enough for me.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250