So I really like the different buildings and bases that mini art has to offer one problem they are done in a vaccuform style and cause a lot of problems to cut out at least for me

does anybody have a secret technique

Frank go to Mini-Arts web site for a tutorial on the easiest way to cut and assemble their kits

I agree. They are a big PITA, and need a lot of trial and error cutting and fitting. And, if you cut too much, filling and patching. And sometimes forcing and clamping walls to meet at 90* (can't find the degree symbol!). But when the dust settles,they can be a very nice model. Note: floors, and roofs and rafters are usually a weak point in MiniArt buildings and I scratch build mine from scrap balsa, etc. Rusty Stumps makes ,or used to make, strips of European style shingles on heavy gauge paper, colored to simulate slate, terra cotta, etc. They also make laser-cut wood stringers and steps for interior (and exterior) detailing.

This will help:
http://www.miniart-models.com/index.htm?/Assembly/page_01.php
Good luck!

thank you so much

They have tutorials on their website. It just takes patience & practice. The end result is very satisfying .
Use a very sharp hobby knife & a straight edge when cutting. Use several strokes to cut instead of one hard one.

An easy way to cut the parts out is to score along the cut line with a couple of passes with a sharp blade, and then just snap off the piece. Your score line is the 'path of least resistance' and a neat break will follow that line.

I do this and then pull out a large sheet of sandpaper, place it flat on my workbench and then sand the entire piece flat (to the center line)
Works pretty well and does most times require very little filling afterwards

Yup. That's the best way to do it. Just have to apply even pressure on the plastic piece while sanding otherwise one side will be lower than the other .

I've built a couple of them, when you're sanding them use a figure 8 motion over the sand paper. I used an old (as in no longer useable confined clearance grout float and poster mounting tape(double stick and leaves no residue) for even pressure.