Gary,
Yes it is crude but it works. It did stop most of the "crashing" when hitting pot holes etc. The cut end of the springs were "open & ground" as the spring makers call it. See here http://springipedia.com/compression-end-types.asp

The main springs I measured at 129lb/in. The rebound at 389lb/in before I cut approx .75in off them.

I have not got my Mog now, just too many cars. But if ever I got another I would not bother with modifying the as built suspension, I would ring SSL and just pay up.
It just depends on your circumstances and whether you plan to keep the car or not.
Cheers
John