Because of the grass, when we place the marker, it is placed crookedly and weighs in the air. This looks like a bug, and it looks strange.

Video:
https://youtu.be/K2VXv_bTCs8

It would also be nice to turn off collisions for them (if I'm not mistaken, this is implemented in Buildcraft) so that we can safely go through and not run into them while moving.

Fixed a bug where the frame was not placed.

Both have been fixed. It will be reflected in the next release.

I also noticed a bug with Optimum Process Quarry, it seems the frame is not being built correctly for it. I understand that this is not a stable version yet, but I decided to inform you about it.

@PTOM76
It seems this is still not fully fixed. I am using version 1.2.0-RC2 and the problem remains partially. If you try to put a marker on a sunflower, the problem repeats.

I don't think there is any problem with sunflowers.
The specifications are the same as for logs.

I know about Optimum Process Quarry.
It will be fixed in the next release.

How is Optimum Process Quarry different from other quarries? I was just trying to test, and I only realized that it ignores the blocks we placed inside the pit.

Optimum Process Quarry omits some processing to make it lighter.
Normal Quarry detects and processes all blocks within range.
I'm struggling to fix a bug in the Optimum Process Quarry frame.

Why did you decide to create different types of quarries? It would be more convenient to have one type of quarry, and different improvement modules for it (liquid removal / acceleration, etc.). It would also be nice to have a GUI interface for the quarry to install those modules there.

This is because I reproduce a mod called Compact Engine.
I'll think about the GUI interface.