May I suggest that you forget about lapping the Spyderco. It is not necessary. Just "break in" the hone properly and it will function just fine.
I just went thru this with a new guy this afternoon, AxelH, .

BTW, the Spyderco's work much faster when a slurry from either a Nagura stone or diamond spray is used.

Instead of using a 325 DMT for restoring a very bad edge I use wet/dry sandpaper. It is very fast. This afternoon I ripped a new edge on a vintage razor with a bunch of small nicks in about 5-10 minutes using 325 grit Gatorgrit sandpaper. It leaves a much nicer edge that the DMT.

Just my $.02,