As Tom say's TAIGEN HULLS come with a quick release, the good news is that it comes as a complete kit including instructions, which means that it will convert a HENG LONG body as well as a TAIGEN body so they are interchangeable, If you are building a PANZER 4 and you are fitting engine bay hatches this requires the removal of the HENG LONG locating points and this is where the use of "NEO-DYMIUM magnets are so useful. You mount them on the stubs of the HENG LONG locating points fore and aft of the hull. The magnets can be found at
http://www.first4magnets.com
Both the magnets and the dealer come with my recommendation.

shaun
Mike if you wish to convert your STUG to magnets this is the product numbers I think would be most useful as these magnets are pre-drilled and countersunk so they can be screwed into position, ( I have learnt the hard way that glue alone will not hold the magnets in place)
F102S and F102N -- 10mm O.D.x 3mm I.D.x 2mm