# 2019 Update of Which Rail Should I Get Debate

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#### BMcD

##### Well-Known Member
I'm new here, and I'm taking a risk by posting this in the ground support rather than beginner section.

I have read many threads on here with great but sometimes conflicting information about launch rail selection. I have seen threads with great images of the various profiles, including this awesome image created by terryg.

In the image, it appears the "micro" button is quite tight in the Makerbeam slot. There are threads in which users have even reported that the early micro buttons from rail-buttons.com had a tendency to snag in the Makerbeam rail.

But all those posts are fairly old, and my question is whether this got sorted out at some point. For my 13mm and 18mm motor rockets, is the micro button from rail-buttons.com a good solution when paired with the 10mm x 10mm Makerbeam?

I would avoid the problem altogether by getting a 15mm rail, but I fear I will have problems flying 4 fin 13mm rockets from the 15mm rail. In fact, if someone can verify that a 4 fin 13mm body tube rocket with a micro button will fly off a 15mm rail, I will avoid the "which rail should I get?" issue altogether by simply getting the larger rail.

#### BMcD

##### Well-Known Member
Well, after much additional reading on here, I ordered a 15mm x 15mm x 1800mm rail from Misumi that I plan to use with micro buttons for 13mm, 18mm, 24mm, and light 29mm motors. We will see how it likes an Aerotech Initiator on a G80 at some point. The existing pad will still support rods if necessary, so if I need to add a 1/8 rod for a particular smaller rocket I can.

#### BMcD

##### Well-Known Member
As an owner of a 10mm MakerBeam rail (actually 2), I think you made a wise choice. I decided to get the smaller MB rail because I was afraid my smallest rockets would not fit on the Misumi rail (see posts above). In hindsight, the number of models that will fit a 10mm but won't fit a 15mm is infinitesimal. And the micro buttons seem like they could hang up (but have not hung up) in the tight quarters of the 10mm rail slot.