diff --git a/flashchips.c b/flashchips.c
index 53d053a..77e4cd3 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -5516,141 +5516,117 @@ struct flashchip flashchips[] = {
 		.model_id	= W_25X10,
 		.total_size	= 128,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = { {4 * 1024, 32} },
 				.block_erase = spi_block_erase_20,
 			}, {
-				.eraseblocks = { {32 * 1024, 4} },
-				.block_erase = spi_block_erase_52,
-			}, {
 				.eraseblocks = { {64 * 1024, 2} },
 				.block_erase = spi_block_erase_d8,
 			}, {
 				.eraseblocks = { {128 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {128 * 1024, 1} },
 				.block_erase = spi_block_erase_c7,
 			}
 		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Winbond",
 		.name		= "W25x20",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= WINBOND_NEX_ID,
 		.model_id	= W_25X20,
 		.total_size	= 256,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = { {4 * 1024, 64} },
 				.block_erase = spi_block_erase_20,
 			}, {
-				.eraseblocks = { {32 * 1024, 8} },
-				.block_erase = spi_block_erase_52,
-			}, {
 				.eraseblocks = { {64 * 1024, 4} },
 				.block_erase = spi_block_erase_d8,
 			}, {
 				.eraseblocks = { {256 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {256 * 1024, 1} },
 				.block_erase = spi_block_erase_c7,
 			}
 		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Winbond",
 		.name		= "W25x40",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= WINBOND_NEX_ID,
 		.model_id	= W_25X40,
 		.total_size	= 512,
 		.page_size	= 256,
 		.tested		= TEST_OK_PRW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = { {4 * 1024, 128} },
 				.block_erase = spi_block_erase_20,
 			}, {
-				.eraseblocks = { {32 * 1024, 16} },
-				.block_erase = spi_block_erase_52,
-			}, {
 				.eraseblocks = { {64 * 1024, 8} },
 				.block_erase = spi_block_erase_d8,
 			}, {
 				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
 				.block_erase = spi_block_erase_c7,
 			}
 		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Winbond",
 		.name		= "W25x80",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= WINBOND_NEX_ID,
 		.model_id	= W_25X80,
 		.total_size	= 1024,
 		.page_size	= 256,
 		.tested		= TEST_OK_PRW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = { {4 * 1024, 256} },
 				.block_erase = spi_block_erase_20,
 			}, {
-				.eraseblocks = { {32 * 1024, 32} },
-				.block_erase = spi_block_erase_52,
-			}, {
 				.eraseblocks = { {64 * 1024, 16} },
 				.block_erase = spi_block_erase_d8,
 			}, {
 				.eraseblocks = { {1024 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {1024 * 1024, 1} },
 				.block_erase = spi_block_erase_c7,
 			}
 		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Winbond",
 		.name		= "W25x16",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= WINBOND_NEX_ID,
 		.model_id	= W_25X16,