I done a bit, I'll throw some pics up later. First attempt the ground was uneven so raised the subframe onto mitre posts and solid blocks. Over time it has sloped in the middle hehe, but impossible to fix without a crane or taking some apart to access the subframe. It has railings and steps up to it. The ground was a bit soft in the first place. Great deals on decking here atm. 16x16 grooved including subframe and 2x50 deck screws €400.