Lowering 69 Standard Bug

How difficult is to install lowering adjusters to the I beams, and do I have to cut and weld them in? Would it be smarter to let a pro. do the job.

Thanks...........................

Here is a great post on lowering a late model ball joint Vw Type 1.

http://www.thesamba.com/vw/forum/viewtopic.php?t=143095