I have a had a look at this and even downloaded the plans (well they only cost 12 quid so why not). There is a yahoo group called cheaper aircraft (or something similar) where they get a lot of stick and there is always a lot of discussion about if they will fly or not. Also the weight is very close and most of the people on cheaper aircraft seem to be struggling to keep the weight down. Personally I think you would struggle to make one SSDR compliant. It might be possible using the wankel engine that the escape kid uses but then thats not cheap by anybodies reckoning.
There are other Part 103 ultralites that might transfer over to SSDR but the American system is a lot more flexible than the UK system and there is a lot more middle of nowhere for people to play in away from the eyes of the FAA.
There is an SSDR section on the BMAA forum where this sort of thing gets discussed a lot.
I wonder if the beastie that Bill Brookes designed for Scap heap challenge is SSDR compliant. Built in two days by three people, can't be bad.