Just wonder if anyone knew of any strops for multi-blade razors like Mach 3 or Phantom Fusion? If not, is there some way a regular straight razor strop can get the job done? Last, if you've done this before how many shave can you get out of the blades before they're no good? I know this is an odd question, (especially with many DE users here , sorry!) but any info would be helpful, thanks!