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Gavin,
I started by building my own wedge from a 60mm 30 degree optical prism..it worked very well....
I had an opportunity to buy a Baader and went for it.
The eyepiece end can accommodate a T thread to C adaptor and allows the DMK to mount securely..
The Lunt design is fairly basic, but does perform pretty well.
Over on the Solar Chat group they have stripped down both the Lunt and the Baader for comparison...
An interesting finding was that the Lunt prism was a thin tapered (slight wedge) piece of glass...in the Baader it's a "proper" 15deg (?) optical glass wedge prism.
Which ever one you go for, the surface detail will be better than with the film/ aperture glass filters.
Just remember to fit the additional ND filters.
Hope this helps.
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