Tis' true. Pomona makes a load of stuff that works just fine and cost less. My piercing probes are Pomonas. There are also lots of specialty automotive probes designed for specific makes but you can get by without them if all you're doing is a Supra. That said good tools are an investment. If you really want to know what's happening get a scope.
What you really need is one of these. Can't say I use it much but it's nice to have
What you really need is one of these. Can't say I use it much but it's nice to have