Well, got a my rings and seals to replace the faulty dust seal on the trim cylinder. For the life of me I can't get that dust cap off with 90 degree angle needle nose or punches. I need a spanner wrench. Does anyone know what the diameter of the holes in the cap? If I have to, I'll buy an adjustable one but they're a little higher and I prefer one that fits exactly. I want to say it's 1.5", but it's probably metric.