A common question which i get a lot during season.
The answer: Yes and No :-)
1/ Loop-Knot system
Every line is connected to a kite trough a loop and knot system. Sometimes you can find
the knot at the pigtail of the kite or at the end of your lines. If you use a brand X-bar for a brand Z-kite, it may happen that knots have to be connected with knots.
You simply solve this problem by putting a set of extra pigtails in your quiver. No big spender? It's also common that kitelines end with a loop/knot at the steering lines, so you can choose. End with a loop-loop you simply make a knot at one end. No ideal setup but you can kite,...
When your valves are delaminating, this means that your buddy is asking for retirement. Most kites produced before 2010 used a thermal sensitive glue to make a strong bond between the base of your valve and your bladder.
Due to the thermal sensitive glue, high temperatures and time cause delaminating of your valves.
What to do?
You can't do anything about it, other than replacing your valves. If one valve starts to delaminate, others will follow on short notice, so replacing bladders is the only option. If the canopy is in no good condition, don't spend any money on replacing just one valve, just be brave and let it go.....