Splayed window reveals in a block build

Hi,

Apologies for resurrecting this old post but im struggling to find information on this.

Traditional block build with 150mm cavity. I want to have splayed reveals on the inside of the windows.

Following conversations with blocklayer the only option that has come is cutting each block for each window which is a lot of work.

Could the setup in the image possibly work, using insulated plasterboard to create the angle?

Anty thoughts?

@ KongFu_Badger

Probably too late for you now, but see the picture of how I had the block layers install the splayed blocks around several windows on a job I’m managing.
I had a carpenter cut the Lite blocks on a wet saw.
There were 220 blocks in total to be cut, with the waste from one block used for the next level. The flat part is intentional—nothing looks worse than a splay running into a window when hanging a blind.
Our cavity was filled with 200mm pumped bead.

Nice job, whats the angle 45?

any pics showing the lintel detail?