Tom,
I have not tried a pump. I find that 100mg sildenafil and foreplay works fine for a very decent erection. The Trimix is icing and and cherry on top
. I am going to dose down to 6 units. That should work for 1-2 hours.
Here is my Trimix formula
Prostaglandin (Alprostadil) 10 mcg/mL (10mg)
Phentolamine 1 mg
Papaverine 30 mg