Making Progress

It was fine and the best day for R/C flight yesterday. Kyosho Sukhoi 31 40, Yoshioka Pegasus ST and Tetra Rookie 20 were brought to the flying place at Iga Ueno in Mie prefecture, several problems were found in them promptly.
Sukhoi 31:
Too much elevator area for acrobatic purpose causes too much sensitive reaction reading to Auto-rotation phenomena, leveled rudder causes Knife-edge downing direction in both right and left flights, 240cc fuel tank for 40 motor fuel consumption is too small for YS 60SR motor, actually it caused motor stop because of lack of fuel supply and it fell down it too complicated bush with ground slope, not a little effort was required to pick it up. It was nothing but a the attitude for a beginners, I'm shame so much.
Pegasus ST:
Thanks to applying some adequate balancing wing weight at the tip of left wing, the reactions while maneuvers became obedient so much, this plane would be useful to train myself for light weight conditioned airplane controlling. The rubber sealing cap on the fuel tank should be replaced ASAP, curing and alteration causes peeling and the pieces causes some clogging in fuel line especially in fuel filter mesh.
Rookie 20:
Lack of tightening of the rubber sealing cap at center position caused pressure and fuel leak and the receiver box was drenched with fuel oil, it would be processed to degreasing procedure, just troublesome so much. Modified throttle fuel refining portion caused caught phenomena at lowest throttle position leading to unstable motor lowest rotational stability, it should be completed on slipping surface finish.

SXE10 TOYOTA Altezza:
By adapting the front total total toe vector direction with the actual rear total toe vector direction, it goes straight incredibly with the least rudder adjusting at the steering centric position reding to the least driving nerve tire. But the innate wondering bad habit of Altezza remains, that is mainly caused by over compliance on suspension lateral arm hinge bushes on both front and rear. Just it is caused by the lack of efforts with packing in by the TOYOTA factory engineers.

11AD Air-cooled VW Super Beetle:
I have a conclusion that the slight mal-rotation on the left rear wheel is caused by the differential side bearing, VW shop Flat4  shows the replacement bearing size, outer, inner and height, 68 41 19 by German made, but as for my wondering, the size is not found in the web site including Japanese companies made, instead 68 40 19 size is available, how come? I guess, the popular size should be the correct?