jim, im glad you are happy with the tiapan.
my ultra sport 60 built in feb1986 or 7 (i cant remember without my notes) has the amount of dihedral the tiapan has, flew great on alcohal and now on electric. now that the tiapan has shown me the light i may have to recover it and add a hatch in the process.
i bought a tiapan for my son, because he took one of my ulra sport kits and started it and there it sits. well i built the tiapan with stock dihedral and it sits in the corner waiting to be test flown. i hope tomorrow it will get weight off wheels, only time will tell.
Joe