The photos are our update new metal electric retract in both of small & bigger size 80 degree & 100 degree with 90 degree rotating version respectively.
80 degree version is produced for WWII War-Birds with some dihedral angle main wing models.
And 100 degree with 90 degree rotating is major for P-40 / F4U / A1.
Small size can be handled the plane size from 25 - 50size or 2 - 3kg and bigger can for 60 - 90 size or 3.5 - 7kg planes.
The following is some link of testing video for sharing: