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For those interested that have both UMX ASK-21 and UMX Radian, here is how I packed two UMX sailplanes in one box. The wife reminded me I can only take one sailplane for our trip to the Cape —White Crest Beach here I come, muhaaa I'm going to stuff two in one box! 
The UMX ASK-21 box is the longer of the two and looked like enough room for the baby Radian to sneak in with very little alterations and modifications. The UMX ASK-21 sits in the original position, nothing changed. The box has enough room for the UMX Radian wing, and the fuselage fits upside down.
- First the UMX Radian wing. Carve a thin section in the middle, right next to where the UMX ASK-21 fuselage sits. Use a sharp knife, no serrations so you don't make a foamy ball static mess. This goes down to almost the bottom (down to the slightly raised horizontal thin area right next to the ASK-21 fuselage) and the wing sits in TE down. (note: I have a small piece of black foam sandwiching the Radian wing to hold it in tight).
- Second, lay the UMX Radian fuselage upside down on the left side at an angle and trace some lines where to make the second cuts.
It is really amazing that the UMX Radian can fit in here. (I had to stitch the two images together so you can see in detail)
Cheers, Thompson
Original https://flic.kr/p/wpnD23
Additional original images
The UMX ASK-21 box is the longer of the two and looked like enough room for the baby Radian to sneak in with very little alterations and modifications. The UMX ASK-21 sits in the original position, nothing changed. The box has enough room for the UMX Radian wing, and the fuselage fits upside down.
- First the UMX Radian wing. Carve a thin section in the middle, right next to where the UMX ASK-21 fuselage sits. Use a sharp knife, no serrations so you don't make a foamy ball static mess. This goes down to almost the bottom (down to the slightly raised horizontal thin area right next to the ASK-21 fuselage) and the wing sits in TE down. (note: I have a small piece of black foam sandwiching the Radian wing to hold it in tight).
- Second, lay the UMX Radian fuselage upside down on the left side at an angle and trace some lines where to make the second cuts.
It is really amazing that the UMX Radian can fit in here. (I had to stitch the two images together so you can see in detail)
Cheers, Thompson
Original https://flic.kr/p/wpnD23
Additional original images
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