home made arms...+2 or +3

i was contemplating the idea of make some plus 2 or plus 3 arms for my trx250r. the only thing is i want it wider and not want to move it forward like a +2 +1 kit. i think i would base them off the stock arms and incorporate better materials. i plan to use 4130 chromo of the same thickness and size as stock. just i want my 250 to be a bit wider and i dont want to dump 2000 dollars on a kit when i think i could make a simple one for way less and uise the things i have lying around. i know this could be dangerous but i have plenty of mentors to guide me and i would like to start a project like this because it seems to be simple enough and not as complex as teh sand rail me and my pops are building.what measurements wopuld i need to take into consideration and what ball joints or heims would you guys recomend? thansk and this again is for a senior project which is required for me to graduate and this seems like a more tangable thing todo than try to build another sand rial by myself.