Repairs aren't necessarily limited to parts in kit
The so-called "repair" kit would be more accurately named a maintenance kit...it includes the parts that wear out and require periodic replacement. Hardware doesn't wear out, it breaks.The cheaper the materials and production methods, the shorter the lifespan. The average lifespan of the cheapest toilet is about 5 years...the Headmate is a little more durable, with a lifespan of about 7 years--IF it's kept properly lubricated and rebuilt every couple of years (Otoh, W-C makes a $1,000 toilet that'll last 100 years or longer...I've seen 50 yr old plus Skippers still working fine.) Raritan toilets cost a bit more, but they're like Timex watches--they manage to keep on working for 15 years or longer even when maintenance is neglected.From the Raritan's, the prices--and the quality--jumps to "thrones" with price tags that start at over $500. Btw...we're only talking about manual toilets.