Depends on the malt. Some pale malts are very low like 60dp while there is one out there that around 160dp.
If I were you I'd just do an AG of this. Just take your kettle, mash in it. Then use a peice of copper with slots cut in it from a hack saw, jigsaw or dremel tool, think copper racking cane with a 'foot' with slots at the bottom, and siphon the wort out of the kettle/mashtun.
Shouldn't be too difficult.