I rear mounted a Himax 6330 in my Caelus too. Rear mounting that style of motor is my preference over a front mount. If you were installing a Pletty or one of the F3A style Hackers, a front mount would make sense. I think a rear mount on the firewall supplied with the model put in place with Hysol is just simpler and effective. I'm sure others here will see it differently. If you installed the Himax in your Caelus, it is exactly the same process in the Etude.