enlarging paper is too fast. Use Azo or Lodima paper. I have now contact printed 4x5s on a contact printer with two 15 watt bulbs. My exposures are around 2 seconds with a minute or less in the developer. I'm using AZO G-4.
I am serious. And you are welcome to send me your surplus of Galerie About this I am only half joking.
Ok it looks like I am doing things right as I am getting the same exposure/developing times as you pstake