Elevation of line drawing

Hi guys, something that I haven't really done before as I usually just print out renders and plans for clients and fitters.
I have attached an elevation of a line drawing that took about 4 hours to complete!!! I presume this shouldn't be the case?

This is due to hidden line removal on the *.skp models... I either move them off the plan or if you don't mind all the extra lines generated untick the remove hidden lines in the Elevation Options to speed it up:

Thanks Daz, that worked a treat.
Time reduced from 4 hours to 2 minutes with the tick of a button.

I always save a copy of the file for fitting plans and remove all the accessories and any details that are technically wrong, but may be there to make the renders look good.
This then produces clearer plans for fitters, & I can make the plan technically right without worrying what it might look like in a render.

Thanks Mitch, I'll try that the next time handy to know.