I purchased a “<span id=”productTitle” class=”a-size-large product-title-word-break”>DC 4.5-100V Digital Voltmeter Ammeter Multimeter Panel, DC Amp Meter Voltage Meter, Current Meter 0-50A Volt Tester, LED Display Voltage Gauge” of yours from Amazon.  For my application there may be more than 50A draw from time to time.  Can I get a larger shunt or will a third party shunt work?  Thanks, Dave </span>