u/swootylicious

A few months ago I had SLC poured on my 2nd floor plywood subfloor

I'm in the process of installing floating LVP overtop but the process is going slow, so it's just been the concrete for 2-3 months

On the original install, the contractor used primer, sealed the plywood gaps, installed a metal mesh, and then poured

However a few days after it cured, he came back to feather out the end of the pour further into the bedroom. This extra feathering did not have a lathe

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I had been noticing a few hairline cracks, but the floor still sounds solid and bonded. However, on the feather, I noticed a lot more cracks forming, and there were a few loose islands

Chipping the loose chunks away, I noticed all of the loose material is overtop a plywood seam

The material in that spot was about 1.5 nickels thick (maybe 3mm?)

I will attach a photo shortly, but I wanted to hear insights into what can be done to patch this properly? Would it be a mistake to use the same SLC? Do I just need to apply it thicker in that spot? Do I need to first do any work sealing the plywood there? Is there a point where it's fine to just put the LVP overtop?

Thanks much

Edit: Photos

Here's the seam after removing most of the loose material

Here's the compound used

So currently I'm looking at the X or the pro mk3

I've never used a launchpad before, but I'm looking to get one to learn piano on

I've always struggled with regular piano (played for about a year), and want to take advantage of an isomorphic key layout, where chord shapes stay mostly the same regardless of how you transpose them

So I'm very interested in using the launchpad, either in its current "chromatic" layout, or to set up a custom layout where each row is either a perfect 4th or perfect 5th apart

So I have questions

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Is this easily achieved with either launchpad? Does one do it better than the other?
I'm not interested in using any features like internal sequencing or chord generation or whatever, I just want to use it as a very customizable grid shaped midi keyboard. Does the pro mk3 have advantages still, or are they mostly related to those things I don't care about
How do the pads compare? I am also a drummer, and while I have a TD-17 drum kit, I do also want to use it for SOME finger drumming. At least as long as it's better than those AKAI pads or KORG pads
Have you all used the launchpad for proper piano playing? Have you found it effective? Or do you generally find other layouts (conventional piano, hexagon layout, etc) to be more comfortable?

Thanks all

Self Leveling Compound loose chunks