We need to replace the tines on our Horse tiller. Has anyone had experience with aftermarket tines? Prices are as low as $85 on ebay. The standard tine set from Troy-Bilt is $178 while the Custom (heavy duty) set goes for about $220. Although we have a large garden, the soil is a clay-loam with no rocks. Sure would appreciate hearing from anyone who can help us make a wise choice.