Hi Tuyen,
I haven't had time to complete the project yet, was very busy with work until last month.
The amp was running fine but I've burnt out two type 50 globes because the filament was too hot so I need to change the filament transformers. I will update this thread when I do that.
Running your horns with SET amps sounds like a good idea but you might want to ask around because last time Brian had one built for his horns but I heard he didn't use it because it's too much for his horns and the sound became bloated.
Cheers,
William