Pat King (PDKLLC.COM) produces great kits of many sizes. Lately, I've been building some of his very small ones.
The attached photo has the twin engine Baby Ringmaster (red, with two .020 engines). The Micro Ringmaster Bipe (yellow) uses a TEE DEE .010. The Micro Ringmaster Stunter (silver) has a TEE DEE .010. The Baby Ringmaster Gyro (red/blue) has a Babe Bee .049. And the unfinished Micro Flite Streak will use a TEE DEE .010.