I am in the midst of prototyping a new set of pee guard with stainless steel material which is much more sturdy and durable. It will cost me a bomb and I am starting to wander if it is going to be cost effective or not.
I need to learn where to get stainless steel sheets, cutting and lastly, bending them. Definitely can’t bend them like Beckham but in order for me to cut the cost, I must get all these done first.
Also, I just realized that I do not need to install the guard all around the cage. I can opt to just install at the corner where my rabbits has chosen as their toilets. This could help me reduce the cost as well since I can just make a bulk of generic pee guard with fixed measurement.
It would be a little messy with younger rabbits but I believe this solution will come in handy once the rabbit has established its corner.
I shall be posting photos of the new pee guard next Saturday and if all goes well, I shall be working on marketing it locally.
The new pee guard will come in pairs of 2 (12 inch long) pieces of stainless steel plates. I will no longer produce plates at various lengths as by having generic plates, I am able to cater for cages in different dimensions.
Tru-Luv Rabbitry: Quality Holland Lops in Malaysia 
keep me update about ur inovation!
it is definitely better than V1 but the price is a little high coz metal is expensive. I have yet to find a good supplier. But for now, it will cost much more than the previous version and only covers the corners that your rabbit uses as toilet (not the entire cage perimeter).
i think v2 sounds better as v1 covering the whole perimeter, makes the cage look narrow and smaller.
I will update this weekend on the pricing because at the moment it doesn’t seemed to be cost effective. If the price is higher than a corner litter tray, then I’ll drop the project until I can find a cheaper supplier for my materials.