
I'm sorry to say but the Wahl ones will not go through your SWD's coat the next time round :d
The best in my eyes are cheaper ones Oster, but I'd rather pay that bit more and get the Aesculap ones, yep there £200 but they've worked on my Spanish now for 13 years and they were second hand. I've never had to send them off for repair either. Not only have I done my 5 over the years, but other peoples SWD's, other breeds and x-breeds also.
I use a 7 blade all over but I must admit sometimes I scissor the head as it takes so much longer to grow and actually doesn't grow as long as the rest of the body.
Hope your pup is doing well and register on here as there are a number of SWD owners on this site and we love to talk about them :d
Terri, don't know about the book and how to groom them as it was me doing it :d :d But no, look behind the Americanisation of the book and it's quite good.