creativity.
Welcome to GRUNDSTEIN.
Here you can find manuals or kits for my unique designs and Information on my other
projects from the world of colorful bricks.
Hi
My name is Felix
Everything started 2015 with the first drafts for my now infamous modular cathedral. The cathedral started as a project for my own modular city and quickly became something much bigger once I uploaded it's instructions to Rebrickable in 2019.
My goal is to deliver buildings with an amount of detail and complexity which you simply don't get anywhere else.
For me, it's very imporant that you have as much joy building my designs with all their intricate techniques as you have joy when you fall in love with the details of the finished build.
Current Project: Burg Steinemark
Burg Steinemark -Castle Steinemark- is my first "real" Set, financed through crowdfunding. It has everything your heart desires: 830 bricks from the manufacturer Woma, printed instructions, sophisticated building techniques and a beautiful box. It was created together with the youtuber @Klemmbausteinwelt (KBW) as producer, @reptim_Bricks as importer, me as product designer and Leonie Faller as graphics designer.
Burg Steinemark reached 85,000€ with over 1300 supporters in 67 days on Startnext.com and will be delivered at the end of 2025.
You can find all my MOC designs on Rebrickable.com.
Rebrickable is a great platform where creators share and sell instructions for custom LEGO builds — called MOCs, short for “My Own Creation.” These are original designs or creative mods of existing sets, made by fans for fans. When you buy a MOC on Rebrickable, you're getting just the instructions — you’ll need to get the parts yourself.
Each of my designs comes with detailed, easy-to-follow instructions, made in Stud.io, and an XML parts list. That list makes it super simple to automatically order everything you need from sites like BrickLink.com or BrickOwl.com.
Want to skip the part hunting?
Check out the options below to get a complete kit with all the pieces—either:
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using official LEGO bricks from BuildaMOC.com, or
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using high-quality compatible parts from LesDiy.de, a Chinese manufacturer.
