 So we work together very closely and we came up with our first prototype. Look at the first prototype design The dimensions are pretty same. We did some amount of innovation where we reduce some of the pipes We failed miserably when we did the user testing We removed the pipes and used for gripping in accidents For example, you slip you ought to grip something we removed those pipes. You can look at the CAD model And we said, you know We are all used to this plastic molded chairs are very comfortable, right? The Lamba support is very good I said, why don't we use these plastic molded seat backs? So we went to the seat manufacturer and we bought a plastic molded seat back and bolted it to the To the Palki and we quickly prototyped this we make made the whole prototype in stainless steel pipe Because now we have experience from Ajanta Palki And a lot of people said why don't you composites? Composites will be lighter than stainless steel But I knew from my experience that composites are very expensive and they are they have larger lead time for molding and processing and you know implementation And then you know longevity also is an issue We had more strength in stainless steel welding and local fabrication. So we also look at that as our option And we went to Katra again and we did the test and the porters were very unhappy They said, oh, where are all my pipes? Because you saw there's so many reasons for which the pipes are there just you know integrated everything We put one pipe structure around it. We give a nice look at this how we give the handle We brought the handle forward and we look at the comfort of the person who's sitting What happens with all of us is we always bothered about the patron or the pilgrim was sitting Here the focus has to be the porters not the pilgrim As I told you the porters were pretty unhappy because there was some you know serious issues of Gripping holding and it was not sitting in the pattern of their traditional palki and that change was very difficult for them so we went back quickly and We made one more prototype. So here what we did we copied their organization. We call it organization the slopes the grips The angles are you seeing now very very close to the original palki We just replaced the plastic with stainless steel. We added innovative manufacturing details So that the weldings will not break. We added an integral seat and we perfected the seat So the weight is not big. So the seat doesn't need any maintenance You know what happened with the molded seat, you know It was very comfortable to sit but on long run the screws were coming off the seat was getting weak And it need to be replaced within six months So the plastic molded seat was completely unacceptable. So we went ahead with the stainless steel integrated seat And then again we went for the you know trials. We found out, you know, what the issues are See there was this very interesting detail where this footrest was in the bottom and there was a pipe to support When you're coming in and out you could trip on the pipe So what we did was we raised the footrest up So when you raise the footrest up the whole center of gravity went up and that's very detrimental for the porters The center of gravity line is very critical for them. That is a very important lesson We learned from this prototype that we can't mess around with the center of gravity loads So they also make the pilgrims sit at an angle So there's so much Development of participatory design in this that the porters had done a lot because of their experience They were running this over the years So they with that experience, you know, we need to you know, we need to learn very humbly sometimes we fail miserably But we learned from them. What are the critical factors and came up with all the details?