Hardwork99,
I think it would be a good idea for you to include at least a small number of wet jelqs into your routine. When I did PE in the past, my routine primarily consisted of dry jelqing and later wet jelqing and manual stretching and I made some good length gains. Manual stretching by itself is a very good exercise, however in my opinion combining manual stretching with wet jelqs can produce sinergic results.
From what I`ve read on this forum it would appear that jelqing at lower erection levels and taking longer strokes (5 seconds), then adding a tug upon reaching the glans is advisable for those who want their jelqing to be more length orientated.