Brushless Jammin CRT Project

[Gustav]

The 1950 comes with a 5mm shaft now,i have one.The other 19 series come with 4mm shaft i think unless you specify 1/8",my 1920 has a 4mm shaft.
You're right to support the rear of the motor,a must IMO with the heavier motors.You'll have to figure a way to adjust the height of the support for changing pinions.
My choice personally would be a 1950/10 or 11 on 8s.Same overall weight as a 2250 on 6s,but with more battery power available and lower current draw/longer runtimes.
If you go 22 series,2240 is overkill enough,the 2250 is excessive to say the least and the CRT is relatively light.