I'm not planning on immediately making that figure, however that shell crest was on a number of helmets, so I'm going to make one as a separate crest.
The links PF has shown show mainly edo period kabuto, but apparently because wild looking elaborate kabuto were seen during the sengouku period, these can be hard to date,
Therefore I think that putting a few of the outlandish helmets in a sengouku miniature collection is perfectly plausable.
I believe that my miniatures would be more compatible with kingsford that perry as I hear kingsford are also larger than perry.
Thanks for showing the miniature CID I'm always happy to see examples of my miniatures painted by others, looks like you did a good job. I try to make the detail crisp as possible also I hope to have more painting guides ready soon. However if anyone is unsure about what kind of colours to use, look at the painted miniatures on my site as I have used accurate colour schemes.
Cheers