Gwr font

Results to date of my work on this font can be seen at--
http://cinduworld.tripod.com/gwr_script.htm  (that's "gwr_script").  Sorry
the jpg's are a bit slow, and the roman annotations on the font image are
not always clear.

Problems:
1. at present, the dipthongs are two keystrokes, which sometimes causes the
finals not to connect with the consonant bar.  It would be laborious, but I
could make individual symbols for the diphthongs (there are 16).  This would
also help with---

2. Tone marks:  ideally, the keystroke sequence should be Consonant -
vowel/diphthong - final - tone, but it seems impossible to type the tonemark
behind the final.  Any suggestions?  At present, the tonemarks sometimes
work in the sequence C-V/D-TONE-Final, and with further tinkering would
probably work consistently.   I can live with that, though it's not the way
a Gwr keyboard would work.  I'd like to hear from those of you who've
designed complex systems like this-- though must confess I may not
understand what you say......:-)

3. I don't entirely understand why the C symbols are so dark and thick while
the Vs are quite light, though I suppose it has to do with their relative
sizes.  Also, the image shows the script at 32 point, and below 20 point the
Vs become really unreadable.  Should I enlarge everythng?  Or would it help
to make the V space larger-- make the C uprights a bit shorter and move
their bar up???  (I should play around with this, now that I mention
it.....)