All the above suggestions are great.

Having everything you can in the same position each time, wing stand marked at perfect height, and same position on the wing, cradle at the same height, ......

Also the R wing first, as it sits in the back of the spar box, if you start with the left the spar wants to side back.

When inserting the left wing, as the spar is going in, you have to pull the spar initially forward a little by opening the canopy. This keeps the bushings from hitting. ( the spars are not smooth, the bushings are sticking out.) If you do not do this then you can push out the second wing quite easily. This in also one area where the fore aft alignment of the wing comes into play, because if it is off the bushings will also rub.

I don't have electric, but I have replaced the gas strut in my rigger, so I can go out to the tip and raise and lower the wing myself easily, and it will stay in that position. Your electric rigger should be great for this,. Use this method for getting the wings in, but then as others have noted, make fine adjustments by raising and lowering the cradle. I start with the cradle high, and then lower to get final alignment.

Hope this helps.

Kevin Anderson
92
DG 400 146