Hey guys just got a spektra 2.5 i want a different stroke lenght, probably for colour and lining, would you recomend the 3.6 or the 4mm?... Serious answers only please, killerink have the 4mm. Ready to order now but a 3.6 i will have to wait 2 weeks.. I use a 4mm cranker for lining and a 3.5 neotat for colour at the mo, cheers for opinions,