I'm going out on a limb posting my progress on this kit. Most of the people here whoop my butt at building these. However, I look at a project like this and starting running through all the stuff that needs to be done and I end up walking away and never finishing.
This build is too important to me, since its a gift for my son. I hope you don't mind using this thread as motivation to keep the project going.
Here's the status so far:
Pre-build is complete and I've begun gluing and seaming parts. Any correction or scratchbuilding is done at this stage. I bought a whole bunch of tiny magnets, so I'm adding them all over the place. Currently there are nine in the torso to hold the backpack. The backpack is very heavy, so I figured 9 should do it. I was a bit surprised to find that superglue didn't hold the magnets as strong as I'd like, so I used Gorilla glue.

There are 10 magnets in each foot and I plan to mount Leopard D on an acrylic base covered with a thin sheet of tin. The same stuff I have on the backpack.
The missile bay in the both legs are not very detailed and the seam was so bad, I just rebuilt it from sheet styrene.

And so far the coolest change I've done is with the gun on Leopard D's arm. I could not figure out a way to detail the gun and then mount it on the arm. If I detail the arm first, the gun would be messed up. If I detail the gun first, I can't mount it on the arm and detail the arm. So I broke out the magnets again. I mounted a magnet in the central area of the gun (under the white patch) and another in a channel built into the arm.
Then I filled in the holes for the kit's base sliding mechanism. Now they are completely separate and slide perfectly. The magnets hold so tight, I don't have to worry about it falling off.


Last thing, I drilled out all the vent ports on the main beam weapon and built a gattling-like set of tubes and mounted them inside to give a bit of detail. While I was at it I drilled out the rest of the weapons too.

All in all the build is going well, but I'm starting to hit snags working on the legs and trying to fill some of these seams. It feels like my arm is going to fall off if I sand any more.

I look forward to any detail suggestions or criticisms.