 Once the prototype is there, you again go for user testing and then we found out thousand more new problems. You worked so hard, came out of the valley of death by climbing all those stairs, by having consultants and finally you land up square. But then you said you did all those studies earlier with mock-up models, why didn't work? But that's not a working prototype. So here you can see how you are always taken back after you do the user studies. It's so important in the early design phase, okay. So here we did the testing, we found out all the problems and now we need to launch our pilot and the whole design now has to go back to the drawing board, go back to conception. Again build three concepts and come back to the production because you not lost much because you just made one prototype. How can this vane tracer be more easy to hold? How can it be smaller? Multiple thermomal mock-ups, same process will go out in the field, check out with caregivers, check out with nurses, check out in the hospitals, which form will work, which is convenient to hold. So we had to marry the designs, we modified the PCB because now the design was ready. So the PCB had to be just reconfigured and then build the CAD models thanks to the support of the small industry in Bangalore. Then we have new techniques of painting which makes the product strong and then we came up with a very important aspect of what should be the battery life and whatever battery to use. We will use a battery which is long lasting, a battery which is available very openly and very easily and very low cost. So we use this battery, maybe if you don't charge it, it works for around 2-3 days and made this pilot production of 10 vane tracers and then we again went for testing. We still came up with some more problems. So whenever you do use a testing, you will come up with problems but now interestingly we are digressing our whole focus. Our cause was to design a vane tracer for blood banks so that people who come to donate blood don't get scared and things like that. And now when you are doing a testing, we said this product is good, now it can go to multiple places and when that happens, you will find out that their requirements are different. The intensity requirement is different. You need more intensity when you do the vane tracer for anesthesia. So we said no problem with this product, we have to mass produce. So let us do those changes. See I am not saying that we are always correct, we made a lot of mistakes in this process and you need to identify our mistakes too and say what we should do and what we should not do. So we did all that and then finally we went to various hospitals in Pune. Luckily now we collaborated with a person who supplies chemicals to blood banks. Then we went back to the PCB design, we changed the intensities, we looked at the locations and then very interesting infrared is what, heat right. So our first LEDs were actually if you keep for more than 30 seconds it would actually give a little pain. Rather removing pain you are giving pain right. So we had to relook at the heat transfer in the PCB. So then we need to look at you know transmittivity, then we put up some filters in the middle, then we had to have heat sinks. See how complex the product becomes once you go forward. The students are simple, infrared it can give you light, I throw infrared from the top I can see the vein and finally we reach a stage which is our you know third value of death. We finished the pilot and we now have to launch it and we are stuck with numerous issues which need to be solved.