What is Reddit's opinion of Meinl Make Your Own Cajon Kit with Snares - MADE IN EUROPE - Baltic Birch Wood, Includes Easy to Follow Manual (MYO-CAJ)?

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Meinl has kits. I purchased one and assembled/stained it myself.

You can buy them on Amazon

Here are a few pics of mine: one two three

Cheaper and more customization if you already have wood glue, clamps, etc.. I also highly recommend an orbit sander.