I think you're imagining the Stormhound to be much bigger than I am - it's definitely bigger than person size, but still more of a powered armour than a mini-mech. I'm imagining it at the same size as the machine I based its' appearance on, the MADOX-01 from the anime of the same name. 

[img]https://cartoonresearch.com/wp-content/uploads/2016/08/1988madox-large.jpg[/img]

[img]https://www.attackfromplanetb.com/wp-content/uploads/2016/09/madox-01-2-1.png[/img]

Large powered armour size, for sure; like a 40K space marine. Incredible Hulk sized, or some other similarly large individual. Large enough to go indoors too, in big buildings. Especially if you're not concerned about collateral damage too much. 

A mini-mech to me would be more like something of this size:

[img]https://s.yimg.com/ny/api/res/1.2/9WIf8_4B0gyqWuf8kh9E5g--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtjZj13ZWJw/https://o.aolcdn.com/images/dar/5845cadfecd996e0372f/b0818f3888dcdaf54102f38f2af0c5362abe9e20/aHR0cDovL3d3dy5ibG9nY2RuLmNvbS93d3cuZW5nYWRnZXQuY29tL21lZGlhLzIwMDcvMDgvZ3VuZGFtLWNhc3QtaXJvbi5qcGc=[/img]
Coincidentally, about the same size as a GEAR was/is meant to be. 

Will get a post up shortly too.