Wintesla, TCCAD and my poor results.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mark Hales by way of Terry Fritz <twftesla-at-qwest-dot-net>" <markhals-at-dircon.co.uk>

Hope you people can help here...

Secondary 4"x22" sec with 22 gauge for 38 turns per inch.
Primary 4mm copper tubing, 8mm spacing, inverse conical (max 12 turns for
tuning range.)
2 x 10kv 23mA OBITS in parallel.
Wintesla and TCCAD say I need .0146 mfd of cap. I'm using 3x22nf in series x
2 strings in parallel for .014 mfd -at- 15KV
(These are wax filled, Al foil at 5KV each)
The primary is tapped at around turn 6 or 7.
Static gap of 4 28mm copper tubes.

Now the poor result... Wintesla claims I should see 26" streamers. I see 9"
streamers.
The coil also appear to not like any topload!
If I add a 15" x 4" toroid, I cant tune it.
Do I need many more turns on the primary (I'd rather not go down this path
if possible) or can I re calculate the cap? (I have plenty of .068 mfd and
.047 mfd polyprop to mess with.)
Is the toroid too big?
I suspect the streamer length could be due to lack of topload and I need to
go up in primary turns... Or do I?

(For UK helpers, I'm using Colins 4" sec and Bobs conical primary)
Cheers in advance...
Mark H.