XRAY - Model racing cars

how do you set your ride height i get marginally different results if i drop the car from say 6 inches than if i just press the chassis down and let it realease

also droop without a droop gauage any tips to get that measurement

rebound i can consistently build the shocks with but not without will this hinder my car on bumps

For ride height I drop the car on a flat surface and measure from the lowest points on the front and rear of the chassis. I drop it from about 12 to 16" high and it seems to be pretty consistent for me.

You can measure droop by ensuring your shocks are built to equal lengths then install them and measure them on the car. For instance on my buggy, my front stocks measure 105mm from the center of each mounting bolt. If I want want to change droop, I adjust it and measure my shocks to ensure they are even.
I have a droop gauge and find this method is just as easy and effective.