RFTools Builder
RFTools addon mod adding the builder, shield system and much more
Screenshots
About this Mod
RFTools Builder
RFTools Builder is an addon for RFTools Base which adds the builder (and all the shape cards) and the shield system. This mod is intended to be used together with RFTools Power and depends on RFTools Base and McJtyLib.
Modpacks
Feel free to use this mod in any modpack.
Available Versions
How to Install RFTools Builder on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "RFTools Builder". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.20.1, 1.19.4 (+12 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
RFTools Builder server crashes on startup – what to do?
Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is RFTools Builder compatible with forge and neoforge?
RFTools Builder officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1, 1.19.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with RFTools Builder – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if RFTools Builder consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Similar Mods
Rent Modded Server
Install RFTools Builder with just one click on your server.