'ello 'mates! Aye, a terrific build ya did, Kammo! Try I did, ta see why yer nod linkage 'ad tha' play, bu' naught any movement.. Did ya set th' midpoint in the servo rotation before ya connected th' linkage? When I did th' servo testin', I made sure th' servo was at th' middle o' it's movement range, then connected th' arm so's tha' I 'ad th' same amount of fore-aft "rotation", an' concenquently, same amount o' 'ead nod..
Ya can use th' current amount o' nod fer a specific application tho if ya can't equal it out.. If ya put tha' particular 'ead on a pirate tha' needs ta look down more than 'nother, ya can use tha' "handicap" ta yer advantage, savvy?
Th' drill press I used was jus' a present from me favorite wench.. a $59 trinket from 'arbor Freight, bu' an' indispensible it is! Use th' Roto-zip-type o' bit an' ya can cut thru any material fer props.. Tried a 'ole saw on th' skull 'ole, bu' it kept meltin' th' plastic, even on slow speeds, so i switched ta th' Roto-bits.. worked after that..
Yer too kind fer th' kudos on me builds, bu', like you, I got nearly oll me ideas from others, as it were.. any changes I made ta th' builds were soley rum-induced hallucinations..
Notwithstandin', yer skulls make a fine 'ead fer any swab an' deck'and!!
Captn Jack