DIY Little Guy style hatch?

I'm still scheming & planning, lurking & dreaming....
Been looking at the Little Guy hatch seal setup and wonder if anyone has ever built their own in this way.... Here's a pic (borrowd from DIDG on this forum - thanks BTW)...
I like the fact...
The edge moulding flows right round uninteruppted (A)
There is then some kinda inner seal (B)
This then leaves a little channel in between (C) so any water would naturally flow 'down and out'.
Anyone built like this? Did it work out OK? Seems neater to me than an edge moulding overlapping the sides which could chafe when opening/closing the hatch....
Thanks once again to your uber helpful guys & girls
Been looking at the Little Guy hatch seal setup and wonder if anyone has ever built their own in this way.... Here's a pic (borrowd from DIDG on this forum - thanks BTW)...
I like the fact...
The edge moulding flows right round uninteruppted (A)
There is then some kinda inner seal (B)
This then leaves a little channel in between (C) so any water would naturally flow 'down and out'.
Anyone built like this? Did it work out OK? Seems neater to me than an edge moulding overlapping the sides which could chafe when opening/closing the hatch....
Thanks once again to your uber helpful guys & girls
