Recommendations for a stainless steel flaring tool

I spoke with speedflow who supplied all my fittings, they said single or dubble will work either way along as it's 37deg flare but single is aircraft standard, I looked at both of them and the single has more surface contact on the flare and the nut will engage more therads on the fitting , so not arguing with that , that is what i went with.
So yes Tube nut and sleeve then flare and if you go with the single practice with the depth you insert your tube as the tool won't do this for you on a single.

Edit: just noticed you have a different tool to what i have so it may well set the depth of tube for you for the single flare.

cudajames said

I ordered the Mastercool 72475 (Thanks @toolmanmike ) and the 37 degree flare. I like the idea of connecting directly to AN fitting. It will be a lot cleaner. If I understand this correctly, I would use a AN tube sleeve and AN tube nut before the flare. Would this still be a double flare? And it should be 37 degrees?

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