If you do not love working in tight places then get a Mooney or some other plane that is easy to work on.
When you remove the plunger here is what you see. Be certain to measure this gap.
You can use a stylus to measure the gap.
This fish smelling fluid was in my brake system. Any idea what it is?I ran the standard aluminum bores for about 10 years with no problems. However, I had plans for new calipers or to have the old calipers sleeved with stainless.
Have fun with your new aircraft.