You can find 130BCD rings as mentioned and people can get the chain line close enough. Current discussion on using road power meters fixed
http://www.timetriallingforum.co.uk/ind ... pic=102807 Cheaper option of the 110BCD adapter plate is available from
http://www.bdopcycling.com/Track%20Parts-ADAPTOR.asp and will allow you to use 144 BCD rings with correct chainline.
Not sure why you want to post track data onto Strava though march83?? I've heard conflicting stories about road SRMs handling the negative torque so good to hear yours is working though. I picked up an SRM Amateur incl BB for $100 to put on my fixed commuter (addicted to data!) so will find out for myself soon... Old wired SRM's are pretty bombproof, so although old tech they just keep on working and can be had really cheap. Last SRM Pro I bought complete with fresh batteries was just over $200 delivered!
Not sure why you are worrying about power before getting the bike though Xplora? To be honest as much I am power nerd, I've found having power of least benefit on the track other than pursuits to record output and data for review and preparation for subsequent pursuits... The track is one place where a simple computer to record speed, cadence and take splits works well.