Hi,
I just chopped mine today. Used the comp werkes kit too which is great. I had given this a fair bit of thought, but now I have done it I would def do it again - looks much better.
A couple of observations while doing it:-
1) I have high mounts so the extra long bolts were not long enough (the pipe mounts already had bolts of same size, so while I could mount the main pan, the signal mounts are barely held - will need to get longer bolts from somewhere.
2) Cutting was tricky, only had a large hack saw that was not sharp enough (found out after halfway through), and not much room for a full stroke. Also, the 6.5 inches it said in instructions, would had cut into the welding for the lock, so I had to go 6.25 inches. ALso I found getting the angle of the cut hard to match up. so one side has slightly different angle. On the good side I used tape and no paint damage.
3) Wiring route used in this post was different to CW instructions - I copies theirs and looks ok.
4) Alignment of kit was perfect first time - was expecting to have to bend and fiddle, but I just lined it up first time and all the angles are fine.
5) Seat shut first time with no fiddling or cutting - but for some reason my S4 didn't have the seat knobs as seen in this post.
6) overhang - I had my doubts before buying about how long the pipes would hang out, but after the chop I am more pleased than I thought I would be. If you look at the bike side on, yes they do hang out , but even the slightest angle and the look is much cleaner.
7) attaching plate - no one told me but my NSW (Australia) plate holes dont marry up with any on the kit's plate so have tied on with plastic ties untill I I figure it out.
It took me much longer than the other here, but I using someone elses garage so had to hunt for tools a lot and not that much room. Took about 4 hours with lots of stop starting.
On the whole, it took longer than I thought, but the kit quality is great. Just need to paint the cut metal, buy a new licence plate bulb, and buy longer screws and all done. Next purchase are tiny indicators (I wanted the Rizoma track 1's but they dont sell em anymore!)
Thanks for the initial post and all the other replies - helped motivate me to do it finally.
BEFORE
AFTER