Yeah... the SDF Editor's Aid is here. Exact speeds are in the bottom half in "Groups" section.
http://www.subsim.com/radioroom//sho...d.php?t=139617
Another good one is the SH2 Scenario Hand Edit Guide in the Subsim Legacy Download SHII section
For Exact speeds I use these numbers:
Exact / knots
1 = 1.8
2 = 3.6
3 = 5.4
4 = 7.2
5 = 9.0
6 = 10.8
7 = 12.6
8 = 14.4
9 = 16.2
10 = 18.0
11 = 19.8
12 = 21.6
13 = 23.4
14 = 25.2
15 = 27.0
16 = 28.8
17 = 30.6
18 = 32.4
19 = 34.2
20 = 36.0
Although I like your technique of using exact speeds that result in even knot speeds... 15 knots, 21 knots etc.
Your orders and starting speeds for "I-V Battle Squadron" look good to me. Does that help the formation hold together better?