Hello Petr,
I would like to see lead and tail PTT timings in the CW preferences pane.
I am not good at  Pascal, being a Python and c programmer,  but I did add the following to the speed function as a temporary measure:
sleep(500);
SendByte($04);
SendByte($10);
SendByte($30);
To save you looking this up, these are Set Lead/Tail, Lead Timing, Tail Timing.
It would be nice to have these settable in the CW preferences pane. I only did this for the Winkey settings, not Daemon or K3NG.   I think you can elminiate the K3NG code entirely and just use the Winkeyer code for K3NG.  That is what I am doing. I was working with K3NG to correct some problems with the Winkeyr emulation in the K3NG keyer and it now seems to work OK with CQRlog without using the command-line interface as you are doing in the present code.
Thanks and 73 de Jim, W2XO