I think they just didn't use powerful enough magnets. If the gap is as big as was shown in the video, I have some N52s at home that would fix it when mine comes in.
The instructions are missing parts and got some incorrect as on the rear the top tow point is missing labeled as A11 it should be A2 and the following are missing of the assembly all together
Parts A4 goes in the 2 holes on top of the stowage box on the back of the turret
A5 is the hole covers for the idler adjusters on front
A12 and 13 goes on the back
T-34
2 Pz.4
Korean Pershing
2 M50
2 M51
M1
2 King Tiger
2 Jagdpanzer E75
Alligator
E25 Ausf D
E75
E50
T32
Radar Panther