Warhammer 40K Tabletop Thread XLI: Secondary Opinions

[Wraith]

Quick question for modellers out there: How do Firstborn Space Marine helmets compare in scale to Primaris helmets?

A while ago I built a Grey Knights Sevrin Loth, and for my next project I've decided on Primaris Dark Angels, starting with sending Chapter Master Azrael through the Rubicon.

It won't be too hard - take Master Lazarus, give him the boltgun/sword option and swap his generic helmet for one with wings. Ideally I'd use a Primaris helm, but the only winged one I can find is Lazarus' own which is partially obscured by his hand, so I'd have to cut it out and resculpt which sounds like it could go horribly wrong. As a back-up I'd use a Dark Angels Deathwing Companion helm, but I'm not sure if it would be properly to scale or would look too small. Any suggestions?

In the same vein, I'll be turning a Primaris Chaplain into Primaris Cypher with the addition of a spare Heavy Bolt Pistol and an SM Hooded head... is it going to look silly or is it about right?