Sorry it's taken me so long, but after much practice ( I'm a newbe at honing) here's what I done I ordered a 3 inch by 1 inch by 8inch long stone and a slurry stone. Total cost delivered £25 I lapped the unlapped side with 3 sanding blocks 240, 600 & 1200 grit with water it ended up just as smooth as my 12k J nat. I tried water and different slurries with results that were not usable shaving wise. So I tried oil medium slurry on the original side that I call the cutting side did about 40 circles each way ( I saw that on lynes vids) then I did 10 laps with slightly lighter slurry. Then I wiped it down flipped it over to the side I lapped ( i call it the polishing side) use oil with a light slurry did about 40 laps. The oil I used was mineral oil( baby oil ) the result was ,shocking, for me any way after so long struggling to get a shavable edge I wasn't holding much hope, the blade is a wolmer best special about 1946 5/8 Sheffield made and ground. bought it of eBay for £2.10 scales were broke so I made new from black acrylic, I digress. Any hoo I just had a shower took the Wolmer and I had smooth comfortable shave, so I think the DT works best with oil and if you call indigo jones or e- mail them,they will make you a hone any size and thickness you want my double sided DT works well. it's been a good experiment. Cheers