Sorry Martyn, I don't agree about the topper up comment. I've successfully used Ezibleed to bleed, flush and fill from dry hydraulic systems on Morgans, Formula Fords and other cars. I agree with you comment regarding the difficulty of sealing the cap. If I find it a challenge to get a seal, I use an oil filter removing tool, flexible nylon strap, not chain or metal to tighten the cap; sometimes I use two seals but avoid over-tightening for obvious reasons.
