[RTTY] RTTY Tx options - advice requested

[Dave Hachadorian]

We've got the 10 Meter RTTY Contest coming up this weekend, and 
I'm trying to figure out the best way to do the RTTY Tx function. 
I think the combination of switching to N1MM LoggerPlus, and 
switching to 2Tone as primary decoder have raised some issues. 
Here are some available options as I see them:

I could do AFSK, but I've grown accustomed to hearing the 
915/1085 Hz tone pair, and apparently that's dangerous because 
the harmonics fall into the 2.7 KHz passband of the SSB filter. 
Can I get away with that tone pair?  I'm using a K3 radio,

I love 2Tone for receiving, but apparently its FSK Tx is subject 
to timing jitter if the computer is not a quad-core powerhouse. 
My computer is pretty good, but not THAT good.

I have the parts lying around for G3YYD's deluxe pseudo-FSK 
circuit, with the comparator IC.  I could jump back onto that 
project and probably get it done in time for the weekend.

The FSKit sounds like a good option, but apparently the circuit 
boards and programmed controllers are no longer available.  If 
someone has one to sell, I'd like to hear from you.

I could use MMTTY for Tx.  Apparently its FSK is not subject to 
timing jitter?  I could then use 2Tone in a separate Rx-only 
window, but then I wouldn't see my transmitted text in that 
window, which is unnerving.  I could move my eyeballs between the 
two windows for Tx/Rx, but that is suboptimal.  Overall, this 
sounds like the most certain approach though.  Is MMTTY FSK 
timing solid, even on a moderate-speed computer?  I'm using a 
real PCI serial port card.

Is there an inexpensive hardware modem that I could use for RTTY 
Tx-only?

I would appreciate comments on the above options.  If anyone has 
a better idea, please let us know.

Many thanks.

Dave Hachadorian, K6LL
Yuma, AZ