A scratchbashed service station

[Dave Harris sctchbld]

You're right I forgot about scale sizes. Sometimes it seems the O-rings are just too narrow, but probably the problem is that they tend to be too tall without modification.

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Yes ,sometimes an O ring is too large in diameter to work,especially if you want 1/8 -5/32 or more width. However they can be easily cut down & reglued to a smaller size using CA , usually leaving an invisible splice.