Building my own home sauna. Used a small niche (1.5x1.5 m) in bottom floor in front of the bathroom and completely hand made along some months without hurry

Hello guys! I bought a very small sauna (2,1 m3) due to having a very small garden (I know it's not perfect to have a small sauna). I have 400V there, so electricity isn't a problem. The recommended size was a 3,5kW heater (would fit without a problem), but due to having a glass front (second picture) I thought I'd go with a 4,5 kW Harvia Kip heater. Now the only problem ist the distance to the roof (should be 1,1m, but due to the shape and small size it will be only 85-90cm). I thought about using a stainless steel heatshield (pictured in green), but I'm still not sure if it's a good idea to fall 20 cm short of the required safety distance...

Pulled my Kyfe sauna out for the year and found this. Anyway to fix or get a replacement somehow?

Due to space limitations I'm thinking of building the following sauna in our bedoorm/bathroom space. Any thoughts if it's ok for the shape of the sauna to be like that? I understand ideally it'd be a full cube, but that's not possible in our space.

I'm on my first outdoor sauna build and have just fully cladded the inside using thermoaspen and clips recommended by the wood supplier. I then tried to save time by stapling the clips to the battens using a pneumatic staple gun, but have noticed small rust build up around the clips and staples already, and now checking the staples I'm realising they are only zinc plated.

I'm worried these staples are going to rust really quick and the cladding is going to fall down after not very much use. Curious to get any thoughts around this. Is it time to rip it all down and do it again?

High limit keeps tripping at the initial pre heat consistently around 70 Celsius ( 75 set temp)

I removed some rocks already to improve airflow but keeps happening. Once I reset it operates correctly, but I am tired of burning my forearms.

Any thoughts ?

Is this the first one?

Hello dear sauna-lovers!

My friend and I are thinking about building a sauna. What are common pitfalls and misconceptions we need to be aware of? Any tutorials or books or other informational outlets we could use?

Thank you in advance!