All good advise...
One other thought would be to check out "Snake Brand" guides.
Each guide is a fine tooled little gem...Hard to explain unless you see these guides close-up....They have a site.
No burrs, no prep, legs are always exactly the same length, and milled off.
About the same price as the H&H or RECs
For the spey rod I usually go: Strippers ~ 16 12 ~ snakes ~ 6 5 then size 4 for the balance....Sometimes 3 for the last couple if a fine tipped rod.
Bob Meiser...R.B. Meiser Fly rods