Inverted 25 degree ramp corners and lower grade ramps ( 4 long )

[Teneksi]

I found 45 degree inverted corners, but only at that degree, and there doesn't seem to be any lower ramps yet.

You could imagine how much better this roof could look with either of these:

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[tapemaster21]

I've always wanted these. If you use 2x2x1 ramps, it makes your roof really tall.