MGB shift pattern printed on cigar lighter plug cover. Fits great -snaps- right in, stays secure, easy to remove. Nice little 2-color project, too, for single color printers using the M600 gcode command.
Decided to make this after a friend and I took turns in each other's 1974 manuals last weekend. Mine is a 1974 MG 'B' , his a 1974 Alpha Romeo GT 2000. Different number of speeds and reverse in opposite corners gave me the idea to create this little plug...
Will work for any manual with same shift pattern. Prints in under an hour.
print upright (numbered face on top)
used 3mm brim to help stabilize during printing
used Prusa's 3D colorprint utility to insert filament color change command (M600) before starting the raised shift pattern (new color at 25.6mm layer height when printing at .20 layer heights).
I used PETG because i like PETG. PLA would work great, too. ABS or just about any kind of filament should be fine.