Yeah leave them now. Its Spring! Its hard to say how to cull. Keep main 3 Bines?, 4? 8?.
Learning learning I left all climbers go 8+ in big pots but I think better to cull smaller ones to have 3 to 5 main this time round.
The high growth is the productive. The smaller climbers dont yeild any hops but chew up a lot of energy. Cull them over the season.
That's my approach thoughts for this season. Higher growth.