dove tail ASA question?

[blackdeath1k]

Since I've never used one I really don't know how tight and secure they are. Are they a tight enough fit to be secure mounted sideways instead of hanging below the dove? Its looking like I'm getting ready to convert from flatline tank to a ninja reg with ASA. The ASA I want is a dove tail. But I plan to mount it sideways for my off set tank setup. And to keep plumbing and gauges set up how I like. Do those of you with experience with these think there will be any issues with it trying to pop off the dove tail being mounted in this configuration?

[blackdeath1k]

Mounting this sideways http://store.customproducts.us/index.cfm?fuseaction=catalog.catalog&categoryID=2

And putting one of these on it.http://store.customproducts.us/index.cfm?fuseaction=catalog.prodInfo&productID=176&categoryID=3

[Cyco-Dude]

it should be fine.