1st of all, welcome to the crew! Great to hear you had good fun with the 8m. Let me try to answer some of your questions.
the 1st question, it seems to depend on what kite you’re coming from, some riders have the tendency to pull the bar up to a bar pressure they’re used to. It could very well be you have overpowered the kite. Due to the venturi system on these kites, you actually can fly with it overpowered, as it won’t stall that quick. The venturi system keeps the kite from stalling but it needs flow going on around it. Meaning, if you’re not going fast, keep the kite going by sinussing it. The Venturi is useless if the flow stops, meaning you’re way overpowered compared to other kites and there won’t be any reason for the kite to stay flying. Immediate depowering will help sometimes.
Here’s my little tip: Try to push the bar away from you until the power drops (coming from overpowered), “listen” to the pull on your harness. Pushing out the bar, you may actually experience an increase of pull. Once the pull drops, build up bar pressure to the point where you have the most pull. Once you’ve got this working, you’ll be one of the fastest riders on the water, you’ll be passing other riders upwind from them, great fun. And you won’t have any hindenburging.
I’m totally into the SLE riding style like this, sail that kite!
2nd, I don’t think the harness plays a role here. The rises have a really nice & moderate bar pressure, which can be tuned a bit with the bridle points.
3rd, self-landing from the leash I have no experience with but there is this re-ride handle above the swivel, if you pull the top front line in when the kite is at the edge of the wind window (one tip on the beach), and take a few steps towards the kite, you should be able to self-land it. If the kite bounces, get some tension on the lines and push out the stopper (if it’s too close), pus the bar out as far as you can and try to steer the kite to the side. If you used the re-ride option, it will just slide back in place. Always take care you have plenty of space downwind from you when attempting self-landing.
4 this is very personal, I fly factory, little bit more work but best bar feedback for me (98kg)