My apologies for getting out of sequence here but the firewall kick-started a question.

Most pics that I have found show a normal, upright engine installation. Any Bipe-specific issues on side or inverted mounting? (other than the obvious cowl cheeks). If a RV-4 or other cowl is in the future, what's the downside?

Also, in general, do Hog Bipes build nose or tail heavy?

Enquiring minds ...