3 Ways Compact Speaker Building Advice

Hello all;
I'm looking for some friendly advice for my speaker building project...
My current and long-time speaker project consist of
Scan Speak 18W/8531G-00 mid-woofer
Dayton RS52AN-8
and 1 tweeter needs to be selected. I'm leaning towards choosing SB Acoustics SB21RDC
Years ago I thought I would pursue an DIY compact 3ways speaker project but II spent a lot of time on jobs after graduating from college, these speakers have been in the storage for a very long time.
Now I have been bitten by the idea of building these speakers once again. Pulling the drivers out of storage, I discovered they are pristine.
After consulting I have 2 ideas as follows:
1. The general design would follow the Tony Gee L'ofeo speaker, which I find quite aesthetically pleasing. It has a volume of about 35l and is designed for SS 18Wu but I will edit to reduce the volume to about 30-32l by reducing the depth a bit to suitable for SS 18W8531. The tweeter will be mounted on top of cabinet.

2. cabinet designed based on troels Gravesen SP44. tweeter and mid will use driver i choose.
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Since I lacked the requisite knowledge and experience measuring to design my own crossovers. but i already have behringer ecm 8000 and i can learn gradually. I can also use CNC service very close to home to quickly have a cabinet
I’m looking for suggestions can make any kind of informed decision.
Much thanks